Best OBD2 Gauge Display for Diesel Trucks (2026)
OBD2 gauge displays for diesel trucks compared by ECU data, interfaces, mounting, alarms, listing marks and warranty.
On this page
Top picks at a glance
As an Amazon Associate I earn from qualifying purchases.
- 1
Best OverallLUFI X7 Gauge Display9.7/10View on Amazon - 2
Most Interfaceswiiyii P6 Gauge Display9.6/10View on Amazon - 3
Certified Pickwiiyii P8 Gauge Display9.6/10View on Amazon - 4
Custom DisplayLUFI Xs Gauge Display9.6/10View on Amazon - 5
MH Head Up Display for CarView on Amazon - 6
OBD2 Gauge DisplayView on Amazon - 7
OBD2 GPS Dual System Car HUD DisplayView on Amazon - 8
DC 12V Car Digital Voltmeter LED Display DC 5-28V VoltageView on Amazon
Hooking up a tow for a long grade means watching the gauges that matter: coolant temperature climbing, boost pressure building, fuel burn rising with the load. A factory cluster shows a slice of that picture, and a dedicated display puts the rest where a driver can read it at a glance. This article compares the best obd2 gauge display for diesel trucks, displays that plug into the diagnostic port and read live engine data onto a cab screen.
GarageToolHQ earns a commission when you buy through links on this page, at no extra cost to you. Read our affiliate disclosure.
Quick picks
- Best Overall LUFI X7 Gauge Display: Up to 12 sets of ECU data on the same interface, custom colors and car logo, overload protection stated and a 1 year warranty term. Check price on Amazon
- Most Interfaces wiiyii P6 Gauge Display: 10 kinds of interface with OBD+GPS shown at the same time and more than 100 kinds of data read. Check price on Amazon
- Certified Pick wiiyii P8 Gauge Display: CE, FCC and RoHS listed with a 1 Year Manufacturer warranty term and 8 switchable interfaces. Check price on Amazon
- Custom Display LUFI Xs Gauge Display: Up to 12 sets of ECU data with a custom car logo and digital title colors and a 1 year warranty term. Check price on Amazon
Picks for the garage
LUFI X7 OBD2 Gauge Display – Fuel Car Companion
The LUFI X7 is a multi-function OBD2 gauge display that reads real-time ECU data through a 16-pin OBD-II interface and shows up to 12 sets of ECU data on the same interface, including coolant temperature, boost pressure, air-fuel ratio, fuel consumption and vehicle speed. Display colors, minute pointers and the car logo can be customized, and the listing frames the unit as a companion against vehicle overload. A 1 year warranty term is stated.
Pros
- Up to 12 sets of ECU data on the same interface, including boost pressure and air-fuel ratio.
- Custom display colors, minute pointers and car logo for a personalized dash.
- Overload protection stated, with live ECU data framed as a companion against vehicle overload.
- 1 year warranty term stated.
Cons
- Oil temperature and transmission temperature and pressure are not displayed by default; PID support varies by vehicle.
- Suction cup kit is not included; the base needs double-sided tape on the dashboard.
- Full compatibility is not promised across all brands and model years.
- Not compatible with pure electric vehicles.
LUFI Xs OBD2 Gauge Display – Fuel Car Companion
The LUFI Xs is a multi-function OBD2 gauge display that reads real-time ECU data through a 16-pin OBD-II interface and shows up to 12 sets of ECU data on the same interface, including coolant temperature, boost pressure, air-fuel ratio, fuel consumption and vehicle speed. ECU display data can be freely edited on any dashboard interface, including the car logo and the color of digital titles. A 1 year warranty term is stated.
Pros
- Up to 12 sets of ECU data on the same interface, including boost pressure and air-fuel ratio.
- Custom car logo and digital title colors on any dashboard interface.
- Overload protection stated, with live ECU data framed as a companion against vehicle overload.
- 1 year warranty term stated.
Cons
- Oil temperature and transmission temperature and pressure are not displayed by default; PID support varies by vehicle.
- Suction cup kit is not included; the base needs double-sided tape on the dashboard.
- Full compatibility is not promised across all brands and model years.
- Larger stated footprint than the X7, at 4.06 inches by 1.26 inches by 4.45 inches.
wiiyii OBD2 Gauge Display Car HUD Head
The wiiyii P8 is an OBD2 gauge display with an OBD+GPS dual system that shows speed, clock, RPM, voltage and water temperature, with 8 display interfaces to switch among. The default mode is OBD2 mode, and the unit reads the full car data stream and displays vehicle ECU data. It mounts on A-pillar trim or on the dashboard, and a 1 Year Manufacturer warranty term is stated.
Pros
- OBD+GPS dual system with 8 switchable interfaces and a full data stream read.
- Mounts on A-pillar trim or on the dashboard for a flexible cab position.
- CE, FCC and RoHS listed, the only stated listing mark among these displays.
- 1 Year Manufacturer warranty term stated.
Cons
- Compatibility is stated for most 2008+ cars, with no truck-specific compatibility term.
- Alarm functions are described as multiple without naming each function.
- Setup is described as connecting to USB power, with no cable length stated.
- Speed display waits for satellite lock before appearing.
wiiyii OBD2 Gauge Display Head Up Display
The wiiyii P6 is an OBD+GPS smart gauge that reads more than 100 kinds of data and switches among 10 kinds of interface, showing speed, voltage, fuel consumption, RPM, water temperature and an overspeed alarm. It mounts on the dashboard or sticks to the windshield with an adjustable bracket, and ambient light shifts from blue in normal driving to red when speeding. No warranty term is stated.
Pros
- More than 100 kinds of data read, the broadest stated data coverage here.
- 10 kinds of interface with OBD+GPS shown at the same time.
- Overspeed alarm with ambient light that turns red when speeding.
- GPS function still displays when the vehicle lacks the OBD2 protocol.
Cons
- No warranty term is stated.
- Without the OBD2 protocol, gauge data does not appear; only GPS function displays.
- Compatibility is stated for most cars, with no model-year term stated.
- No listing mark is stated.
Other tools worth a look
MH Head Up Display for CarCheck price on Amazon
OBD2 Gauge DisplayCheck price on Amazon
OBD2 GPS Dual System Car HUD DisplayCheck price on Amazon
DC 12V Car Digital Voltmeter LED Display DC 5-28V VoltageCheck price on Amazon
Compared on paper
| Model | Shop Score | ECU data | Display | Mounting | Compatibility stated | Listing | Warranty |
|---|---|---|---|---|---|---|---|
| LUFI X7 Gauge Display | 9.7/10 | Up to 12 sets | Custom colors and car logo | Double-sided tape to dashboard | American after 2008; Japanese and European after 2005 | Not stated | 1 year |
| LUFI Xs Gauge Display | 9.6/10 | Up to 12 sets | Custom car logo and digital title colors | Double-sided tape to dashboard | American after 2008; Japanese and European after 2005 | Not stated | 1 year |
| wiiyii P8 Gauge Display | 9.6/10 | Full data stream | 8 interfaces | A-pillar trim or dashboard | Most 2008+ cars | CE, FCC, RoHS | 1 year |
| wiiyii P6 Gauge Display | 9.6/10 | More than 100 kinds | 10 interfaces | Dashboard or windshield | Most cars | Not stated | Not stated |
Specifications are manufacturer rated, as published on each listing and collected 1 November 2026.
How the points were given
Each display is scored out of 10 on performance, build, value, safety and warranty, with the weights published on the How We Pick page. A stated safety feature or listing earns safety points, and a stated warranty term with a concrete length earns warranty points.
| Product | Shop Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| LUFI X7 Gauge Display | 9.7 | 30 | 21 | 21 | 5 | 4 |
| LUFI Xs Gauge Display | 9.6 | 30 | 20 | 21 | 5 | 4 |
| wiiyii P8 Gauge Display | 9.6 | 28 | 20 | 20 | 5 | 4 |
| wiiyii P6 Gauge Display | 9.6 | 30 | 20 | 21 | 5 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
What the listings tell you
All of the displays here read ECU data through the diagnostic port and show it on a cab display. The LUFI listings show up to 12 sets of ECU data on the same interface with custom colors and a custom car logo. The wiiyii P6 reads more than 100 kinds of data across 10 interfaces, while the wiiyii P8 reads the full data stream across 8 interfaces. A warranty term is stated on the wiiyii P8 and on the LUFI displays, but not on the wiiyii P6. Only the wiiyii P8 listing states a listing mark, with CE, FCC and RoHS listed.
Buying guide: the best obd2 gauge display for diesel trucks
Match the port and the protocol
The LUFI displays connect through a 16-pin OBD-II interface and read real-time ECU data, while the wiiyii P8 works in OBD2 mode by default and the wiiyii P6 pairs OBD and GPS in a dual-mode unit. Compatibility is stated in car terms: the LUFI listings cover American car brands manufactured after 2008 and Japanese and European car brands manufactured after 2005, and the wiiyii P8 covers most 2008+ cars. If a vehicle lacks the OBD2 protocol, the wiiyii P6 listing states that only the GPS function displays.
Data worth watching on a haul
Coolant temperature, boost pressure, fuel consumption, vehicle speed, RPM and voltage appear across these listings, and the LUFI displays add air-fuel ratio to the same interface. Oil temperature and transmission temperature and pressure are not displayed by default on the LUFI displays, and the built-in PID commands may not suit every vehicle, so confirm support before buying.
Where it sits in the cab
The wiiyii P6 offers 2 install ways, on the dashboard or stuck to the windshield, with an adjustable bracket. The wiiyii P8 installs on A-pillar trim or on the dashboard. The LUFI displays need double-sided tape to hold the base to the dashboard, because the suction cup kit is not included in the packaging. Pick the spot that keeps the screen readable without hiding the road view.
Alarms, light and night driving
The wiiyii P6 changes its ambient light with driving conditions: blue in normal driving, red when speeding, with an overspeed alarm to match. The wiiyii P8 lists multiple alarm functions without naming each function. The LUFI listings frame the display as an overload companion showing live ECU data.
Warranty and listing marks
A 1 year warranty term is stated on the wiiyii P8 and on the LUFI displays, while the wiiyii P6 listing states no warranty term, so weigh that gap if cover matters. Only the wiiyii P8 listing states CE, FCC and RoHS, so it is the pick with a stated listing mark.
Use rated jack stands on solid ground, wear eye protection with power and air tools, keep fuel-burning equipment out of a closed garage, and follow the manual for every tool. Read our Safety Disclaimer.
Garage Fit Check
- Space: the LUFI X7 lists a 1.07 inch depth against 1.26 inches for the LUFI Xs, so check dash space before ordering.
- Power: the wiiyii P8 sets up by connecting to USB power, and the LUFI displays connect through an OBD2 data cable to the 16-pin interface, so confirm the cable route keeps the port accessible.
- Storage: no storage case or mount storage is stated on these listings, so keep the bracket and cable with the truck manual.
- Before the initial job: check that your car brand is listed in the product image, confirm OBD2 protocol support, and have double-sided tape ready for the LUFI base, since the suction cup kit is not included.
FAQ: garage tools
Will an OBD2 gauge display work on a diesel truck?
It depends on the truck port and protocol, not on the badge. These listings state car compatibility in model-year terms: American brands after 2008 and Japanese and European brands after 2005 on the LUFI displays, and most 2008+ cars on the wiiyii P8. Check the product image for your truck brand and confirm a matching OBD-II port. If the vehicle lacks the OBD2 protocol, the wiiyii P6 shows GPS function only.
What data can I watch while towing?
Coolant temperature, boost pressure, fuel consumption, vehicle speed, RPM and voltage are listed across these displays, with air-fuel ratio on the LUFI screens. Oil temperature and transmission readings need PID support on the LUFI displays and are not shown by default.
Do these displays need a phone?
No phone pairing is described on these listings. The displays connect through the OBD-II port or USB power and show data on their own screens.
Where should the display mount?
On the dashboard, on the windshield with the wiiyii P6 bracket, or on A-pillar trim with the wiiyii P8. The LUFI displays use double-sided tape on the dashboard, since the suction cup kit is not included.
Related: the best OBD2 scanner for diesel trucks, the best OBD2 gauge display, the best grease gun for diesel trucks and our diagnostics and electrical hub.
