A strong OBD2 gauge display makes useful vehicle data easier to see while driving, and suits drivers who want more than the factory dashboard provides. The options here range from compact readouts to touchscreens and OBD-plus-GPS displays, with features including speed, RPM, coolant temperature, voltage, trip information, and fault-code functions. Our leading pick, KONNWEI KW206, combines a 3.5-inch color screen with selectable live data and diagnostic functions.
Other choices stand out for a larger touchscreen, GPS mode, or a smaller footprint. Compatibility is a key part of the decision: some products have specific model-year, protocol, or powertrain exclusions, and displayed readings depend on what the vehicle reports.
Check those limits before buying, then compare screen size, supported functions, and mounting needs.
KONNWEI KW206 is the best overall choice because its 3.5-inch color screen can display selectable real-time vehicle data, and it also reads engine fault codes and can turn off the check-engine light. It combines trip-computer and diagnostic functions in one display, with up to 95 selectable data groups noted in the product information. Check your vehicle’s compatibility and remember that available readings depend on what its ECU reports.
Our Top Picks
Best OverallIts 3.5-inch color display offers up to 95 selectable real-time data groups, plus fault-code reading and check-engine-light clearing.
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Best TouchscreenThe 4.3-inch capacitive touch display supports up to nine gauges, visual and audible alarms, wireless updates, and a three-year manufacturer warranty.
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Best Dual ModeIt combines OBD2 and GPS data with speed, RPM, coolant temperature, voltage, and fault-code functions; GPS use requires a clear sky view.
View on Amazon- Best Included Mounts wiiyii P6
- Best Gesture Controls Abliseoum A590S
Compare OBD2 Gauge Displays by Features and Use
| # | Product | Dimensions | Weight | Material | Buy |
|---|---|---|---|---|---|
| 1 | 1. KONNWEI KW206Best Overall | 1.02 x 3.31 x 5.12 in | 275 g | Metal | View on Amazon |
| 2 | 2. ScanGauge 3Best Touchscreen | 5"L x 1"W x 3.2"H | — | — | View on Amazon |
| 3 | 3. MH OBD2+GPS HUDBest Dual Mode | 4.3 x 3.3 x 3 in | 4.16 oz | Plastic | View on Amazon |
| 4 | 4. wiiyii P6Best Included Mounts | 5.24 x 3.54 x 4.33 in | 190 g | Plastic | View on Amazon |
| 5 | 5. Abliseoum A590SBest Gesture Controls | — | — | Acrylonitrile Butadiene Styrene (ABS) | View on Amazon |
| 6 | 6. KUOWEIHUD F3Large speed readout seekers | 2.44 x 1.08 x 2.36 in | 9.6 oz | Acrylonitrile Butadiene Styrene (ABS) | View on Amazon |
| 7 | 7. ScanGauge SG2Compact customizable gauge users | 4.8"L x 1"W x 1.5"H | 80 g | — | View on Amazon |
| 8 | 8. Dyno Racing P6Dual-mode multi-interface drivers | 3.5 x 4.3 x 5.2 in | 6.72 oz | Glass, Metal, Plastic | View on Amazon |
| 9 | 9. Lufi X7Specified non-EV vehicle coverage | 4.34 x 1.07 x 2.88 in | 10.56 oz | Plastic | View on Amazon |
| 10 | 10. Shadow D-Meter 2 PlusCompatible combustion-car drivers | — | — | — | View on Amazon |
Detailed Reviews: Best Obd2 Gauge Display

#1 · Best Overall
1. KONNWEI KW206
- Dimensions: 1.02 x 3.31 x 5.12 in
- Weight: 275 g
- Material: Metal
Best for: Trip computer and code readers.
Why it ranks #1: Its 3.5-inch color display offers up to 95 selectable real-time data groups, plus fault-code reading and check-engine-light clearing.
The KONNWEI KW206 pairs a 3.5-inch color screen with real-time gauges and engine fault-code functions, making it a combined trip computer and diagnostic display. It can show selectable ECU data and read trouble codes, with the listed ability to turn off the check-engine light.
The KW206 can present multiple real-time parameters, including speed, RPM, coolant temperature, fuel consumption, and total mileage, supporting trip and engine monitoring on its color screen. Its selectable data display can show up to 95 groups across the screen’s four corners, so drivers can choose readings to view together. Code reading and check-engine-light clearing add diagnostic functions to its gauge role. The supplied facts describe connection at the diagnostic connector but do not specify a vehicle-year range beyond the title’s 2003-and-newer claim.
- 3.5-inch color display
- Selectable real-time data, up to 95 groups
- Reads engine fault codes and can turn off the check-engine light
- Combines trip-computer and gauge functions
- The title specifies 2003-and-newer cars, but the supplied details do not define protocol or vehicle-specific exclusions.
Skip it if you need confirmed compatibility for a specific protocol or vehicle configuration beyond the listed 2003-and-newer claim.
The KW206 is for drivers wanting selectable live gauges and basic code functions in one color-screen unit. Check that your vehicle matches the stated year coverage before relying on its diagnostic features.
Full product details
| Brand | KONNWEI |
|---|---|
| Item Dimensions | 1.02 x 3.31 x 5.12 inches |
| Item Weight | 275 g |
| Dimensions | 1.02 x 3.31 x 5.12 inches |
| Manufacturer | KONNWEI |
| Material | Metal |
Listed on Amazon as: KONNWEI KW206 Car OBD2 HUD Digital Meter Gauge All in One Automotive Trip Computer Smart OBD Speedometer Water Temperature Fuel Pressure Tester for All 2003 and Newer Cars
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#2 · Best Touchscreen
2. ScanGauge 3
- Dimensions: 5"L x 1"W x 3.2"H
Best for: Touchscreen gauge and trip users.
Why it ranks #2: The 4.3-inch capacitive touch display supports up to nine gauges, visual and audible alarms, wireless updates, and a three-year manufacturer warranty.
A 4.3-inch capacitive touchscreen with 16 million colors puts the ScanGauge 3’s controls and gauges on a vivid, navigable display. It can show up to nine gauges, while visual and audible alarms notify drivers when parameters exceed preset thresholds, combining monitoring with configurable alerts.
The touchscreen provides an interface for navigating the display, and the allowance for up to nine gauges lets drivers arrange multiple readings together. Visual and audible alarms add two alert channels when monitored parameters cross preset thresholds. Free Wi-Fi software updates keep the unit’s software current, while the supplied suction-cup mount and OBD2 cable support installation. It works with 1996-and-newer cars, light trucks, and van-based RVs with a 16-pin OBD2 port; readings depend on vehicle reporting.
- 4.3-inch capacitive touchscreen with 16 million colors
- Displays up to nine gauges
- Visual and audible preset-threshold alarms
- Free wireless software updates
- Not every sensor is available as a live gauge; readings depend on vehicle reporting.
Skip it if you need every vehicle sensor as a live gauge; available readings depend on what the vehicle reports.
A strong fit for eligible 1996-or-newer vehicles when touchscreen navigation, multiple gauges, and dual-format alarms matter. Check for a 16-pin OBD2 port and remember that gauge availability varies by vehicle.
Full product details
| Brand | ScanGauge |
|---|---|
| Included Components | OBD2 Cable, Quick Start Guide, Suction Cup Mount |
| Dimensions | 5"L x 1"W x 3.2"H |
| Manufacturer | Linear Logic LLC |
| Part Number | SGIII |
| Manufacturer Warranty Description | 3 Year Manufacturer Warranty |
| Model Number | SG3 |
| Screen Size | 4.3 inches |
Listed on Amazon as: ScanGauge 3 Touch Screen OBD2 Scanner, Digital Gauges & Trip Computer SG3
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#3 · Best Dual Mode
3. MH OBD2+GPS HUD
- Dimensions: 4.3 x 3.3 x 3 in
- Weight: 4.16 oz
- Material: Plastic
Best for: OBD and GPS data monitors.
Why it ranks #3: It combines OBD2 and GPS data with speed, RPM, coolant temperature, voltage, and fault-code functions; GPS use requires a clear sky view.
The MH display combines OBD2 and GPS systems, giving drivers access to vehicle-reported readings as well as GPS information. Listed data includes speed, RPM, fuel consumption, water temperature, mileage, altitude, compass, and voltage; its fault-diagnosis functions also scan and clear codes.
The OBD2 connection draws listed readings such as RPM, fuel use, coolant temperature, and voltage from the vehicle ECU, while GPS mode offers an alternative source for driving information. Fault-code scanning and clearing add basic diagnostic tasks to the display’s monitoring role. GPS operation requires an open road and more than five satellites for normal use, according to the supplied instructions. The details also advise checking a tight OBD connection if operation is interrupted.
- OBD2 and GPS dual-system operation
- Lists speed, RPM, fuel use, temperature, and voltage
- Includes fault-code scanning and clearing
- GPS data includes altitude and compass
- GPS normal use requires more than five satellites, and the display may not turn on reliably during driving.
Skip it if you need dependable GPS data where more than five satellites cannot be searched, or uninterrupted operation is essential.
The MH suits drivers seeking both OBD readings and GPS information, with fault-code tools included. GPS use depends on satellite reception, and the supplied notes flag possible power interruptions during driving.
Full product details
| Brand | MH |
|---|---|
| Item Dimensions | 4.3 x 3.3 x 3 inches |
| Item Weight | 4.16 ounces |
| Dimensions | 4.3 x 3.3 x 3 inches |
| Manufacturer | MH |
| Material | Plastic |
Listed on Amazon as: MH Head Up Display for Car, OBD2+GPS Dual System, OBD2 Gauge Display, GPS Speedometer, Tachometer, Water Temp, Volt, Overspeed Alarm Fault Diagnosis
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#4 · Best Included Mounts
4. wiiyii P6
- Dimensions: 5.24 x 3.54 x 4.33 in
- Weight: 190 g
- Material: Plastic
Best for: Dual-mode driving data display.
Why it ranks #4: Its OBD and GPS modes cover speed, temperature, voltage, and trip data, and the package includes a rotary suction cup bracket and 3M tape.
OBD and GPS modes give the wiiyii P6 two ways to present driving information, including speed, direction, and mileage. That flexibility lets drivers use vehicle-reported readings through OBD or access listed GPS data such as altitude and satellite count, with a choice of suction-cup or tape mounting.
In OBD mode, the P6 lists speed, coolant temperature, voltage, fuel consumption, RPM, and mileage, while overspeed, temperature, and voltage alarms can flag selected conditions. GPS mode adds altitude, satellite count, and acceleration and braking tests, giving drivers a second source of trip and motion information. The included rotary suction-cup bracket and 3M tape offer two mounting approaches; the OBD cable is also supplied for the vehicle connection.
- OBD mode reports speed, coolant temperature, voltage, fuel use, and RPM
- GPS mode includes altitude and satellite count
- OBD alarms cover overspeed, temperature, and voltage
- Includes a rotary suction-cup bracket, tape, and OBD cable
- The listed GPS mode does not provide the OBD mode’s coolant-temperature and fuel-consumption readings.
Skip it if you need coolant temperature or fuel consumption while using GPS mode; those readings are listed under OBD mode instead.
A fit for drivers who want a compact display with both OBD and GPS information, plus mounting choices. Choose it only if its listed data and alarm set match your vehicle-monitoring needs.
Full product details
| Brand | wiiyii |
|---|---|
| Included Components | P6-HUD, OBD cable, Rotary suction cup bracket, 3M tape, Manual,Crowbar |
| Item Dimensions | 5.24 x 3.54 x 4.33 inches |
| Item Weight | 190 g |
| Dimensions | 5.24 x 3.54 x 4.33 inches |
| Manufacturer | wiiyii |
| Material | Plastic |
| Model | P6 |
| Thread Style | Dual |
Listed on Amazon as: wiiyii OBD2 Gauge Display Head Up Display for Cars, Speedometer for Car P6
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#5 · Best Gesture Controls
5. Abliseoum A590S
- Material: Acrylonitrile Butadiene Styrene (ABS)
Best for: Gesture-control dual-mode commuters.
Why it ranks #5: The 2.5-inch HD LCD offers OBD-plus-GPS modes, adjustable speed units, and gesture control; its default gesture sensitivity may trigger falsely.
OBD and GPS dual modes give the Abliseoum A590S two sources for its driving display, while smart light sensing adjusts to changing ambient conditions. Its 2.5-inch HD LCD uses large fonts, and speed units can switch between KM/H and MPH for different display preferences.
The A590S combines OBD and GPS modes with gesture control, giving drivers more than one way to interact with its listed display. Smart light sensing and a 2.5-inch HD LCD with large fonts support visibility across changing light conditions, while switchable KM/H and MPH accommodates preferred speed units. The product description calls installation plug-and-play and compact for daily commutes or long trips. Gesture sensitivity is factory-set to its highest level, which can trigger unwanted inputs.
- OBD and GPS dual modes
- 2.5-inch HD LCD with large fonts
- Switchable KM/H and MPH speed units
- Smart light sensing and gesture control
- Gesture control ships at maximum sensitivity, which can cause false triggers.
Skip it if you want gesture controls to arrive at low sensitivity; its factory setting is the highest sensitivity and can trigger falsely.
The A590S suits drivers who want dual-mode speed display, adjustable units, and gesture interaction for regular trips. Its maximum default gesture sensitivity is a meaningful boundary for buyers who prefer fewer accidental inputs.
Full product details
| Brand | Abliseoum |
|---|---|
| Included Components | Obd2 Gauge Display with Speed |
| Manufacturer | Abliseoum |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Model | 10008003 |
| Warranty Description | 3 years warranty |
Listed on Amazon as: OBD2 Gauge Display for Cars, OBD+GPS Smart Gauge with Speed & RPM, A590S
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#6
6. KUOWEIHUD F3
- Dimensions: 2.44 x 1.08 x 2.36 in
- Weight: 9.6 oz
- Material: Acrylonitrile Butadiene Styrene (ABS)
Best for: Large speed readout seekers.
Why it ranks #6: Its 2.8-inch HD LCD displays speed, RPM, fuel consumption, turbo pressure, coolant temperature, voltage, and trip mileage.
A 2.8-inch HD LCD gives the KUOWEIHUD F3 a larger display for its prominent digital speed readout, helping drivers view speed alongside other listed vehicle data. The screen also presents RPM, fuel consumption, turbo pressure, coolant temperature, battery voltage, and trip and total mileage.
The F3 combines a large digital speed display with several real-time parameters, so drivers can view speed alongside engine and trip information on one screen. Its listed readings include RPM, turbo pressure, coolant temperature, battery voltage, fuel consumption, and both trip and total mileage. The 12-volt specification and included F3-Speedometer identify its power and package details; the supplied information does not specify a mounting bracket or additional diagnostic functions.
- 2.8-inch HD LCD
- Large digital speed display
- Lists RPM, turbo pressure, coolant temperature, and battery voltage
- Shows fuel consumption and trip and total mileage
- The supplied package details list the F3-Speedometer but no mounting bracket.
Skip it if you need a listed diagnostic scanner or supplied mounting bracket; neither appears in this product’s supplied details.
The F3 suits drivers who want a clear speed-focused display with several engine and mileage readings on one LCD. Its listed package is display-only, so account for mounting needs before choosing it.
Full product details
| Brand | KUOWEIHUD |
|---|---|
| Included Components | F3-Speedometer |
| Item Dimensions | 2.44 x 1.08 x 2.36 inches |
| Item Weight | 9.6 ounces |
| Dimensions | 2.44 x 1.08 x 2.36 inches |
| Manufacturer | KUOWEIHUD |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Model | F3-Black |
| Voltage | 12 volts |
Listed on Amazon as: Premium OBD2 Gauge Display, 2.8" HD LCD Heads Up Display for Cars
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#7
7. ScanGauge SG2
- Dimensions: 4.8"L x 1"W x 1.5"H
- Weight: 80 g
Best for: Compact customizable gauge users.
Why it ranks #7: This 3.3-inch-screen OBD2 computer offers customizable real-time fuel-economy gauges and works with 1996-and-newer vehicles using a 16-pin OBD2 port.
At 4.8 by 1 by 1.5 inches and 80 grams, the ScanGauge SG2 is a compact OBD2 computer for drivers who want customizable real-time fuel-economy gauges. It also provides trip-computer and diagnostic-tool functions, placing several kinds of vehicle information in a small unit.
The SG2’s customizable gauges let drivers tailor which reported readings they monitor, while its fuel-economy focus supports attention to consumption during everyday trips. Its trip-computer and diagnostic-tool roles add functions beyond a basic speed display. The included OBD2 cable and Velcro support connecting and securing the compact unit. It works with 1996-and-newer cars, light trucks, and van-based RVs that have a 16-pin OBD2 port; displayed readings depend on vehicle reporting.
- Compact 4.8-by-1-by-1.5-inch dimensions
- Customizable real-time fuel-economy gauges
- Combines trip-computer and diagnostic-tool functions
- Includes OBD2 cable and Velcro
- Not every vehicle sensor is available as a live gauge.
Skip it if you need every sensor shown live; gauge availability depends on your vehicle’s reported data.
A practical option for eligible vehicles when compact size, customizable gauges, and fuel-economy monitoring matter. Confirm that your vehicle has a 16-pin OBD2 port and supplies the readings you want.
Full product details
| Brand | ScanGauge |
|---|---|
| Included Components | User Manual, Quick Start Guide, OBD2 Cable, Velcro |
| Dimensions | 4.8"L x 1"W x 1.5"H |
| Item Weight | 80 g |
| Manufacturer | Linear Logic |
| Part Number | SG2 |
| Manufacturer Warranty Description | 3 Year Manufacturer |
| Model Number | SG2 |
| Screen Size | 3.3 |
Listed on Amazon as: ScanGauge SG2 Ultra Compact 3-in-1 Automotive Computer with Customizable Real-Time Fuel Economy Digital Gauges for OBD2 Vehicles
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#8
8. Dyno Racing P6
- Dimensions: 3.5 x 4.3 x 5.2 in
- Weight: 6.72 oz
- Material: Glass, Metal, Plastic
Best for: Dual-mode multi-interface drivers.
Why it ranks #8: Its OBD-plus-GPS modes cover speed, RPM, coolant temperature, voltage, and turbo pressure, with a rotary suction cup bracket and tape included.
Ten display interfaces give the Dyno Racing P6 several ways to arrange its OBD and GPS driving data. Its listed readings include speed, RPM, fuel consumption, coolant temperature, voltage, turbo pressure, and mileage, while manually adjusted alarm flashing adds a customizable visual alert.
OBD mode connects to the vehicle ECU and presents real-time readings such as speed, RPM, fuel use, coolant temperature, and voltage on the heads-up display. GPS mode provides an alternative operating mode, while ten interfaces let drivers choose among different data layouts. Manually adjusted alarm flashing offers a way to set a visual warning. The included rotary suction-cup bracket, tape, OBD cable, and crowbar provide mounting and connection accessories; OBD mode requires an OBDII/EOBD-compliant car.
- Ten display interfaces
- OBD and GPS operating modes
- Lists speed, RPM, fuel consumption, temperature, voltage, and turbo pressure
- Includes suction-cup bracket, tape, and OBD cable
- OBD mode is specified for OBDII/EOBD-compliant cars.
Skip it if you need OBD readings from a vehicle that is not OBDII/EOBD compliant; the listed OBD mode depends on that compatibility.
The Dyno Racing P6 fits drivers seeking several display layouts, dual operating modes, and adjustable flashing alarms. OBD data depends on OBDII/EOBD compatibility, so check that boundary against your vehicle.
Full product details
| Brand | Dyno Racing |
|---|---|
| Included Components | 1x HUD,1x Rotary suction cup bracket,1x Manual,1x OBD cable,1x tape,1x Crowbar |
| Item Dimensions | 3.5 x 4.3 x 5.2 inches |
| Item Weight | 6.72 ounces |
| Dimensions | 3.5 x 4.3 x 5.2 inches |
| Manufacturer | Dyno Racing |
| Material | Glass, Metal, Plastic |
| Model | P6 |
| Voltage | 12 |
| Warranty Description | 6 months |
Listed on Amazon as: Dyno Racing OBD2 Gauge,OBD+GPS HUD Digital Display Gauge 10 Kinds Display Interface,Speedmeter & RPM,Water Temperature,Voltage,Turbo Pressure,Driving Mileage, Manual Adjusted Alarm Flashing
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#9
9. Lufi X7
- Dimensions: 4.34 x 1.07 x 2.88 in
- Weight: 10.56 oz
- Material: Plastic
Best for: Specified non-EV vehicle coverage.
Why it ranks #9: It supports certain American, Japanese, and European vehicles, but excludes pure electric vehicles and cars using the J1850 communication protocol.
The Lufi X7 specifies compatibility with American makes after 2008 and Japanese and European makes after 2005, giving eligible drivers a clear starting point for checking vehicle fit. It is an OBD2 gauge display with overload protection, but the supplied details set important limits on coverage and temperature data.
Before choosing this display, compare your make and model year with the product’s coverage information: the stated ranges are American vehicles after 2008 and Japanese and European vehicles after 2005. Pure electric vehicles and vehicles using the J1850 communication protocol are excluded; a J1850 vehicle may show “Searching for Protocol” and fail to work. Oil and transmission temperature or pressure are not shown by default, though the supplied notice says corresponding built-in PIDs can be used.
- Lists vehicle-year coverage by American, Japanese, and European makes
- Identifies pure electric vehicles as unsupported
- Warns that J1850 protocol vehicles will not work
- Title specifies overload protection
- Oil and transmission temperature or pressure readings are not displayed by default.
Skip it if you drive a pure electric or J1850-protocol vehicle, or need oil and transmission readings shown by default.
Consider the X7 if your vehicle falls within its stated make and year coverage and its OBD display suits your needs. Its protocol exclusions and non-default temperature data make careful fit checking essential.
Full product details
| Brand | Lufi |
|---|---|
| Included Components | Cable/base bracket |
| Item Dimensions | 4.34 x 1.07 x 2.88 inches |
| Item Weight | 10.56 ounces |
| Dimensions | 4.34 x 1.07 x 2.88 inches |
| Manufacturer | Wenzhou Xuzhan Electric Co., Ltd. |
| Material | Plastic |
| Voltage | 12 |
| Warranty Description | 1year warranty |
Listed on Amazon as: LUFI X7 OBD2 Gauge Display – Fuel Car Companion, Multi-Function & Overload Protection
View on AmazonWhy it ranks #10: Its 1.3-inch display targets compatible 12V and 48V cars, but listed exclusions include EVs, hybrids, and several model-year or brand groups.
Compatibility with 12V and 48V gasoline and diesel cars gives the Shadow D-Meter 2 Plus a defined audience for its compact 1.3-inch display. Its listed features include a DTC scan and clear function and RGB accent lighting, pairing fault-code access with a restrained-size gauge presentation.
The 1.3-inch screen keeps the display physically compact, while the included mounting kit and OBD2 cable provide the stated components for installation. DTC scan and clear functions let drivers access fault-code handling from the unit. Compatibility is restricted: the supplied notice excludes EVs and hybrids and gives specific exclusions for older US, VAG, and 2024-and-newer Mercedes-Benz vehicles. Oil and transmission temperature readings are not supported on all cars, so they are unsuitable as a guaranteed monitoring requirement.
- 1.3-inch screen
- DTC scan and clear functions
- RGB accent lighting
- Includes an OBD2 cable and mounting kit
- Oil and transmission temperature readings are not supported on all cars.
Skip it if you drive an EV or hybrid, or rely on oil or transmission temperature readings being available on your car.
The D-Meter 2 Plus fits drivers of compatible gasoline or diesel cars who want a small display and DTC functions. Its vehicle exclusions and variable temperature-data support are important limits.
Full product details
| Brand | Shadow |
|---|---|
| Included Components | D-Mete 2 PLUS display, obd2 cable, mounting kit and manual |
| Manufacturer | Auto Jaw Co., Ltd |
| Part Number | SW10171 |
| Model Number | SW10171 |
| Screen Size | 1.3 inches |
Listed on Amazon as: Shadow OBD2 Display D-Meter 2 Plus – Minimalist & Futuristic Multi-Functional Gauge with RGB Accent Light, Sleek Black Frame, DTC Scan & Clear, High-Tech Design for 12V/48V Cars
View on AmazonWhy a Gauge May Not Show Every Reading
An OBD2 display can only show data that the vehicle makes available, so a listed parameter is not a guarantee that it will appear on every car. ScanGauge 3 and ScanGauge SG2 explicitly note that readings depend on what the vehicle reports and that not every sensor is a live gauge. Lufi X7 adds a separate limitation: oil and transmission temperature or pressure are not displayed by default, and corresponding built-in PIDs may be needed.
Shadow D-Meter 2 Plus also warns that oil and transmission temperature are not supported on all cars. Before choosing a display for a specific number, confirm the vehicle exposes the relevant data and whether the device requires an additional PID or setup step.
A long feature list describes potential functions, not universal coverage.
Compatibility Traps: Protocols and GPS Reception
A connector that fits does not necessarily mean an OBD2 gauge will communicate with a vehicle. Lufi X7 does not support vehicles using the J1850 protocol, and its product information says it may remain stuck on Searching for Protocol when connected to one. Its listed vehicle-year guidance also differs by region and brand, so check the coverage information before purchase.
Several other products have powertrain or model-year restrictions: Abliseoum A590S notes that its compatibility depends on the car, while Shadow D-Meter 2 Plus excludes EVs and hybrids and lists additional brand and year limits. GPS mode introduces a different constraint: MH OBD2+GPS HUD requires moving the vehicle to an open area and searching for more than five satellites for normal use.
Confirm both communication support and intended operating mode.
How to Choose an OBD2 Gauge Display
Screen Size and Display Type
Choose a screen size and interface that make the readings you need easy to distinguish in your intended mounting position. Listed displays range from Shadow D-Meter 2 Plus at 1.3 inches to ScanGauge 3 at 4.3 inches; KUOWEIHUD F3 has a 2.8-inch HD LCD, and KONNWEI KW206 has a 3.5-inch color screen. A larger screen can provide more room for multiple readings, while a smaller unit may suit a tighter installation, but the product data does not establish visibility in every cabin or lighting condition.
Drivers who want touch controls and a larger interface may prefer ScanGauge Those prioritizing a compact display can consider Shadow D-Meter 2 Plus, while drivers wanting a middle-sized LCD have options such as KUOWEIHUD F3.
Data Functions and Diagnostic Tools
Start with the readings and functions you actually need, because the listed devices vary from basic gauge displays to trip computers with fault-code tools. KONNWEI KW206 offers up to 95 selectable data groups and reads engine fault codes, while MH OBD2+GPS HUD also lists fault-code scanning and clearing. ScanGauge 3 can show up to nine gauges and provides visual and audible alarms.
Other models list combinations of speed, RPM, coolant temperature, voltage, fuel use, turbo pressure, or trip mileage. Choose a diagnostic-capable unit if clearing or reading engine codes matters; select a display with several relevant live readings if monitoring is the priority.
Treat special data such as oil temperature or transmission pressure cautiously, since some products state that availability depends on the vehicle or additional PID settings.
Vehicle Compatibility and Operating Mode
Check model-year, protocol, and powertrain restrictions before comparing other features. ScanGauge 3 and ScanGauge SG2 specify support for 1996-and-newer cars, light trucks, and van-based RVs with a 16-pin OBD2 port, while KONNWEI KW206 is listed for 2003-and-newer cars. Lufi X7 excludes pure electric vehicles and J1850 protocol vehicles; Shadow D-Meter 2 Plus lists exclusions for EVs, hybrids, and specific brand or year groups.
OBD-plus-GPS models, including wiiyii P6 and MH OBD2+GPS HUD, add a GPS mode, but that mode depends on satellite reception rather than ECU data. Buyers of a vehicle with known protocol or powertrain restrictions should prioritize explicit compatibility checks; drivers choosing GPS as a fallback should consider whether they can use the display where satellite reception is available.
Which OBD2 Gauge Display Should You Choose?
Choose KONNWEI KW206 if you want a broad selectable data display plus fault-code reading and check-engine-light clearing. For a larger touch interface, ScanGauge 3 has a 4.3-inch capacitive screen, up to nine gauges, and visual and audible alarms. If you want both ECU and GPS information, MH OBD2+GPS HUD lists dual-mode operation and fault-code functions; wiiyii P6 is another dual-mode option with a rotary suction cup bracket and 3M tape included.
Choose ScanGauge SG2 for customizable fuel-economy gauges in a compact OBD2 computer, or KUOWEIHUD F3 for a 2.8-inch LCD with several driving parameters. Before ordering Lufi X7 or Shadow D-Meter 2 Plus, check their protocol, vehicle-year, and powertrain exclusions carefully.
Frequently Asked Questions
How can I tell whether an OBD2 gauge display will communicate with my car?
Check the display’s product information against your vehicle’s compatibility details before ordering, including its year, protocol, and powertrain where specified. Compatibility varies by product, and some listings note exclusions. Even with a compatible connection, the readings available depend on what your vehicle’s ECU reports.
Can an OBD2 gauge display show data that my dashboard does not?
It may show additional selectable vehicle data, but only when the ECU reports those readings and the display supports them. For example, the KW206 lists up to 95 selectable data groups, alongside trip-computer and diagnostic functions. Check the product information and your vehicle’s compatibility rather than assuming every reading will be available.
Where should I mount an OBD2 gauge display to keep it visible without obstructing my view?
Choose a stable position you can glance at without blocking your view through the windshield or of important dashboard information. Follow the product’s mounting instructions, secure the display before driving, and adjust its position while parked. If no position is both visible and unobstructive, prioritize an unobstructed view.
What is the difference between an OBD2-only display and an OBD2-plus-GPS model?
An OBD2-only display relies on information reported by the vehicle’s ECU, while a dual-mode model lists both ECU and GPS information. The MH OBD2+GPS HUD and wiiyii P6 are described as dual-mode options. Check each product’s listed functions to confirm which readings and features matter to you.
Will every OBD2 gauge display read and clear engine fault codes?
No. Fault-code functions differ by product, so check the listing for both code reading and clearing if you need them. The KW206 reads engine fault codes and can turn off the check-engine light; the Shadow D-Meter 2 Plus title also lists DTC scan and clear.
Vehicle compatibility still matters.
Final Words
For a broad selectable data display combined with fault-code reading and check-engine-light clearing, the KONNWEI KW206 is the strongest all-around fit in this roundup. Prefer a larger touch interface? Consider ScanGauge 3; for ECU and GPS information, compare the dual-mode options.
If choosing Lufi X7 or Shadow D-Meter 2 Plus, verify protocol, vehicle-year, and powertrain exclusions first. With any model, confirm compatibility and remember that available readings depend on your ECU.


