9 Best OBD2 Scanner for Gas and Diesel (November 2026)
The best OBD2 scanners for gas and diesel vehicles include the MOTOPOWER MP69033 Car OBD2 Scanner Code Reader for most gas and diesel drivers, the VDIAGTOOL VD10 OBD2 Scanner Check Engine Code for first-time DIYers, and the BlueDriver Bluetooth OBD2 Scanner for ABS and airbag codes.
On this page (9 sections)
- The best OBD2 scanners for gas and diesel by job
- How these OBD2 scanners compare side by side
- How we compared these scanners for gas and diesel
- What should you check before buying an OBD2 scanner for a diesel?
- Is a handheld reader or a phone adapter better for a gas car?
- Do you need ABS and airbag codes?
- Which scanner fits your budget tier?
- Do gas and diesel vehicles need different scanners?
- Which OBD2 scanner for gas and diesel should you buy?
The best OBD2 scanner for gas and diesel for most people is the MOTOPOWER MP69033, because it reads and clears engine codes on any 1996 or newer OBD2 car or light truck and costs little. Pick the BlueDriver if you want ABS, SRS and transmission codes on your phone, or the TOPDON AD900 Lite for full-system work.
Gas and diesel engines share the same 16-pin OBD2 port on most light vehicles, so a basic reader often works on both. The difference shows up when you need more than engine codes.
The best OBD2 scanner for gas and diesel work depends on what you plan to diagnose. A cheap code reader handles a check engine light, while a full-system tool reaches ABS, airbag and transmission modules.
This guide sorts the picks by what they actually do. Every product here supports standard OBDII protocols, and each one earns a spot for a specific job.
Our picks at a glance
-
1
Best for most gas and diesel driversMOTOPOWER MP69033 Car OBD2 Scanner Code Reader
9.7/10 our score
See it on Amazon -
2
Best for first-time DIYersVDIAGTOOL VD10 OBD2 Scanner Check Engine Code
9.1/10 our score
See it on Amazon -
3
The best OBD2 scanners for gas and diesel by job
MOTOPOWER wins on price and simplicity for engine codes. The rest of the list covers phone-based diagnostics, battery testing and shop-grade module scans.
Pick by the system you need to reach, not by the size of the feature list.
MOTOPOWER MP69033 Car OBD2 Scanner Code Reader: Best for most gas and diesel drivers
- Built-in DTC lookup library
- Reads live data and freeze frame
- 2.8 in LCD with backlight
- Supports 9 protocols
- 6 languages
A cheap handheld reader that reads and clears engine codes on 1996 and newer cars. The built-in fault code library saves you an online lookup.
Pros
- Built-in DTC lookup library
- Reads live data and freeze frame
- Needs no battery or charger
- Clear 2.8 in screen
Cons
- No ABS or airbag codes
- Not for non-OBDII systems
MOTOPOWER fits the driver who wants to know why the check engine light is on without spending much. Its built-in DTC lookup library shows the fault definition on screen, so you don't need to search online for the code.
The reader covers 9 protocols, including CAN, and works on 1996 and newer US cars plus 2000 and newer European and Asian models. It reads live data, freeze frame, I/M readiness and vehicle information.
Its 2.8 in LCD has a backlight and contrast adjustment. The tool takes power straight from the OBD2 port, so there's no battery to charge.
Six buttons handle scrolling and the quick VIN and DTC queries, and the 2.5 ft cable is thick and flexible.
The trade-off is system coverage: it reads engine codes only. ABS and airbag codes need a tool like the BlueDriver or the Foxwell NT604 Elite.
For a diesel with a check engine light and standard OBD2, it does the job.
VDIAGTOOL VD10 OBD2 Scanner Check Engine Code: Best for first-time DIYers
- 2.1 in LCD with backlight
- Built-in database of more than 3000 codes
- Live data and freeze frame
- I/M readiness for smog checks
- 5-year warranty
A plug-and-play reader with a big fault code database and a smog readiness check. The long warranty makes it a safe first scanner.
Pros
- Built-in database of more than 3000 codes
- I/M readiness for emissions tests
- 5-year warranty
- 6 languages
Cons
- Small 2.1 in screen
- Engine codes only
VDIAGTOOL suits someone buying a first scanner and wanting a safety net. Its built-in database holds more than 3000 fault codes, and it shows the definition on screen so a beginner can act on it.
The VD10 reads and clears engine codes, shows live data and freeze frame, and runs an I/M readiness check for emissions testing. It covers all five OBDII protocols and works on 12V cars, SUVs and light trucks.
It also pulls vehicle information such as the VIN and calibration IDs, which helps when you check a used car before buying.
The 2-line LCD is smaller than the MOTOPOWER screen at 2.1 in. You get six languages and a 5-year warranty, which is the longest here.
Choose it over the MOTOPOWER when warranty length and the larger code database matter more than screen size. Skip it if you need ABS, SRS or transmission codes.
BlueDriver Bluetooth OBD2 Scanner: Best for ABS and airbag codes
- Bluetooth link to phone or tablet
- Reads ABS, SRS, airbag and TPMS codes
- Repair reports matched to your VIN
- Live data and Mode 6
- No subscription fees
A Bluetooth dongle that turns your phone into a scanner with more systems than a cheap handheld. It reads ABS, SRS and transmission codes on supported vehicles.
Pros
- Reads ABS, SRS and TPMS codes
- Repair reports matched to your VIN
- No subscription fees
- Live data as you drive
Cons
- Needs a phone or tablet
- Enhanced coverage varies by make and model
BlueDriver suits the driver who wants deeper diagnostics without buying a tablet tool. The dongle pairs over Bluetooth with the BlueDriver app on iOS or Android and reads ABS, SRS, airbag and TPMS codes on supported vehicles.
It also pulls repair reports matched to your VIN, with causes and confirmed fixes. Live data, freeze frames, smog readiness and Mode 6 test results are all in the app.
The dongle stays connected as you drive, so you can watch a sensor reading while the engine runs.
Coverage is strongest on GM, Ford, Stellantis, Toyota, Honda, Nissan, Mazda, Subaru, Hyundai, Mercedes-Benz, BMW and VW. It works on 1996 and newer gas vehicles and select light-duty diesels, including the F-250 and RAM 2500.
The trade-off is the phone requirement. There's no subscription fee, so the one-time cost covers everything.
Our OBD2 scanner for iPhone guide covers app-based options in more detail.
Innova 5210 Code Reader: Best for battery and charging checks
- OBD2 scanner and battery tester
- Reads and clears engine and ABS codes
- Live data with fuel trims
- Oil light reset
- Free RepairSolutions2 app
A handheld that also tests the battery and alternator. Useful when a fault could be a charging problem rather than a sensor.
Pros
- Built-in battery and alternator tester
- Oil light reset
- Live data with fuel trims
- Free app with verified fixes
Cons
- ABS coverage varies by vehicle
- Needs a phone for the repair app
Innova fits the owner chasing a fault that might be electrical. It works as a scanner and a battery and alternator tester, so you can rule out a weak battery before blaming a sensor.
It reads and clears engine and ABS codes, though ABS coverage varies by vehicle. Live data includes RPM, engine temperature, fuel trims and oxygen sensor readings.
An oil light reset saves a trip to the shop after an oil change. The drive cycle readiness feature covers smog and emissions inspections too.
The RepairSolutions2 app offers verified fixes from ASE-certified mechanics with no subscription. That helps when you want repair steps, not just a code number.
Choose it when charging-system health matters as much as the code. Skip it if you need transmission or airbag codes, which it doesn't scan.
TOPDON AD900 Lite Bidirectional Scanner: Best for full-system shop work
- 8 in touchscreen
- Bidirectional control
- Full-system diagnostics
- 8 reset services
- Bluetooth 5.0 wireless VCI
- Android 11
A tablet-style tool that scans every module and sends commands to test parts like injectors and coolant pumps. Built for shops and serious DIYers.
Pros
- Bidirectional active tests
- Full-system diagnostics
- 8 reset services including DPF regeneration
- Large 8 in screen
Cons
- Premium price tier
- More tool than most home users need
TOPDON is the pick for a shop or a serious DIYer working on several vehicles. Its bidirectional control sends commands to the ECU, so you can test injectors, coolant pumps, windows and wipers without guessing.
The tool scans every available module: engine, transmission, airbag, ABS, TPMS and more. It runs 8 reset services, including oil reset, throttle adaptation, EPB reset and DPF regeneration.
The DTC repair guide adds fault code definitions for all systems, though that part is limited to certain Chrysler, Dodge, Jeep and Fiat years.
An 8 in touchscreen runs on Android 11 with a 10000mAh battery rated for about 12 hours. The Bluetooth 5.0 VCI works wirelessly up to 33 ft.
It covers cars from 1996 to 2025 across 60+ brands and 12 languages.
The trade-off is size and price tier: it's a premium tool for someone who needs module coverage. For a home user checking one engine light, the MOTOPOWER does the same core job for far less.
Foxwell NT604 Elite Scanner: Best for four-system checks
- Scans engine, ABS, SRS and transmission
- AutoVIN
- Live data stream
- 4.3 in screen
- Protective case
- Lifetime updates
A handheld that reads and clears codes from four common systems without a phone. The sturdy case and free updates suit regular home use.
Pros
- Four-system diagnostics
- AutoVIN for faster setup
- Protective case included
- Lifetime free updates
Cons
- No reset or relearn services
- No bidirectional control
Foxwell's NT604 Elite suits the home mechanic who wants four-system coverage without a phone. It scans engine, ABS, SRS and transmission, so a flashing airbag or ABS light gets a code you can look up.
AutoVIN reads the vehicle information quickly on supported models. Live data streaming, a built-in DTC library and data playback are included.
The kit ships in a solid protective case, and updates are free for life. It covers 60+ brands across America, Asia and Europe.
Note that it does not support reset or relearn services, so it reads and clears codes but doesn't handle maintenance functions. SRS coverage skips crash data that can't be cleared anyway.
Choose it over the BlueDriver when you'd rather not use a phone and want a screen in your hand. Skip it if you need DPF regeneration or service resets.
Foxwell NT301 Code Reader: Best for smog test prep
- One-click I/M readiness hotkey
- Red-yellow-green readiness LEDs
- Live data graphs
- EVAP and O2 sensor tests
- 2.8 in color screen
- Lifetime free updates
A reader with a dedicated readiness hotkey and simple pass/fail lights. Good when an emissions test is coming up and you want a clear answer.
Pros
- One-click I/M readiness
- Color screen with audio feedback
- EVAP and O2 sensor tests
- Works on 12V diesel with OBD2
Cons
- No ABS or SRS codes
- No reset services
The Foxwell NT301 suits the driver facing an emissions test. Its one-click I/M readiness hotkey and red-yellow-green LED tell you whether the monitors are ready before you drive to the test center.
It reads and clears engine codes and runs EVAP and O2 sensor tests. Live data graphs help you spot odd sensor values.
The 2.8 in color screen stays readable in daylight. A HELP button shows possible causes for a stored code, so you aren't left staring at a number.
It supports all OBDII protocols and works on 12V diesel vehicles that use OBD2. Updates are free for life.
The trade-off against the MOTOPOWER is the smaller feature set for the same engine-only job.
Pick the NT301 when readiness status matters most. Skip it if you need ABS or transmission codes.
Our roundup of the best OBD2 scanners with live data covers graphing tools in more detail.
ANCEL AD310 Code Reader: Best for a glovebox spare
- Reads and clears emission codes
- Live data and freeze frame
- I/M monitor readiness
- Supports all OBDII protocols
- 2.4 in screen
- Compact and light
A basic, sturdy reader for checking a check engine light on the road. It reads and clears emission codes but not ABS or transmission faults.
Pros
- Light and compact
- Thick insulated cable
- Reads live data and freeze frame
- Covers all OBDII protocols
Cons
- Emission codes only
- No ABS or SRS support
- No reset functions
The ANCEL AD310 suits the glovebox. It's light at 12 oz and compact at 8.9 x 6.9 x 1.4 inches, so it slides into a bag or sits on the dash without getting in the way.
The thick cable stands up to being dropped in a car.
It reads and clears emission-related engine codes and shows live data and freeze frame. It covers all OBDII protocols and runs an I/M monitor readiness check.
It also displays code definitions on screen and collects vehicle information.
The limits are clear from the name: it diagnoses emission-related issues only. If the fault isn't emission-related, it can't read the code.
It also won't work on OBDI vehicles even with an adapter. It has no reset functions, so clearing a code is all it does after a fix.
Buy it as a backup reader for a car or truck that already runs on OBD2. For a primary scanner with more reach, the MOTOPOWER or BlueDriver covers more ground.
Autel AutoLink AL319: Best for quick code checks
- Reads and clears engine codes
- DTC lookup
- Live data and freeze frame
- One-click I/M readiness
- TFT color display
- 7 languages
A small, easy reader for engine and emission codes only. It is the simplest pick here and the least capable for anything beyond a check engine light.
Pros
- Simple plug-and-play setup
- Color screen with LED indicator
- One-click I/M readiness
Cons
- Engine and emission codes only
- No ABS or SRS support
- No live graphing
The Autel AL319 is the simplest pick here. It reads and clears engine codes, shows live data and freeze frame, and has a one-click I/M readiness check.
The color display and LED indicator make the basic status easy to read.
It covers 7 languages and works on post-1996 OBD2 vehicles. The cable is long enough without getting in the way.
No batteries are needed. The 2.4 in screen is small, and the unit weighs 177 g, so it stores almost anywhere in the car.
The catch is capability: the AL319 detects engine and emission systems only. It doesn't read ABS or SRS codes, and it has no graphing or reset functions.
A 12-month warranty applies.
Pick it if you only ever need to read a check engine light and want the lowest-fuss setup. Most buyers are better served by the MOTOPOWER, which adds a larger screen and a fuller fault code library for the same engine-only job.
How these OBD2 scanners compare side by side
The comparison table lines up screen size, connection type and the systems each scanner reaches. Use it to spot which tools go beyond engine codes and which stay simple.
| Product | Best for | Screen | Power | Protocols | Our score |
|---|---|---|---|---|---|
| MOTOPOWER MP69033 Car OBD2 Scanner Code Reader | most gas and diesel drivers | 2.8 in LCD | Vehicle OBDII port | 9, including CAN | 9.7 |
| VDIAGTOOL VD10 OBD2 Scanner Check Engine Code | first-time DIYers | 2.1 in LCD | OBD2 port | CAN, ISO9141, KWP2000, J1850 PWM, J1850 VPW | 9.1 |
| BlueDriver Bluetooth OBD2 Scanner | ABS and airbag codes | 9.0 | |||
| Innova 5210 Code Reader | battery and charging checks | 2.8 in | Vehicle powered | 8.7 | |
| TOPDON AD900 Lite Bidirectional Scanner | full-system shop work | 8 in touchscreen | 8.6 | ||
| Foxwell NT604 Elite Scanner | four-system checks | 4.3 in | 8.5 | ||
| Foxwell NT301 Code Reader | smog test prep | 2.8 in color | OBD2 port | CAN, ISO9141, KWP2000, J1850 PWM, J1850 VPW | 8.2 |
| ANCEL AD310 Code Reader | a glovebox spare | 2.4 in | OBD2 port | All OBDII, including CAN | 7.7 |
| Autel AutoLink AL319 | quick code checks | 2.4 in color | Vehicle powered | 6.8 |
How we compared these scanners for gas and diesel
We compared each scanner's specs and features against the two things gas and diesel drivers actually need: reliable engine code reading and clear fault definitions. Every product here supports the standard OBDII protocols, so each one can talk to a 1996 or newer gas engine or a light diesel with OBD2.
From there we weighed what each tool adds. Phone adapters like the BlueDriver reach ABS, SRS and transmission systems on supported vehicles.
Handhelds like the Foxwell NT604 Elite bring four-system coverage without a phone. Tablet tools like the TOPDON AD900 Lite add bidirectional tests and reset services.
We also looked at how each tool displays what it finds. A screen with code definitions built in saves time for a beginner, while graphing live data helps when a fault only shows up at certain engine speeds.
Readiness checks matter for anyone facing an emissions test.
Our score weighs specs, features and buyer feedback against what you're shopping for. A high score means the tool does its core job well for the price tier.
It does not mean the tool fits every vehicle: system coverage varies by make, model and year. Diesel drivers should confirm protocol support before buying, since a reader that works on a gas car won't always connect to a heavy-duty truck.
What should you check before buying an OBD2 scanner for a diesel?
Check the protocol first. A scanner only talks to a diesel that uses OBD2, and many older heavy-duty diesels don't.
Confirm the truck uses OBD2
Most light-duty diesels sold in the US from 1996 onward use the standard 16-pin port. The BlueDriver covers select light-duty diesels such as the F-250 and RAM 2500.
Older or heavy-duty engines often run different systems. For the Ford 7.3 diesel, read our OBD2 scanner for the F350 7.3 diesel first.
Decide which systems you need to reach
Engine codes are the basics. ABS, airbag, TPMS and transmission codes need enhanced coverage.
The BlueDriver, Foxwell NT604 Elite and TOPDON AD900 Lite each reach more than the engine. The MOTOPOWER, VDIAGTOOL and Autel stay engine-only.
Look for live data on a diesel
Live data shows RPM, coolant temperature, fuel trims and oxygen sensor readings while the engine runs. It helps on a diesel where a sensor fault can hide behind a smooth idle.
The Foxwell NT301 graphs this data, and the TOPDON shows it across all modules. Basic readers like the ANCEL AD310 and Autel AL319 show it as numbers only.
Is a handheld reader or a phone adapter better for a gas car?
A handheld reader is better for a gas car if you want a screen in your hand and no phone setup. A phone adapter wins when you want deeper codes and repair guidance.
Handheld readers
The MOTOPOWER MP69033, VDIAGTOOL VD10 and Foxwell NT301 all plug in and show results on their own screens. They need no phone, no app and no battery.
That makes them the easiest choice for a quick check on a gas car.
Phone adapters
The BlueDriver plugs into the port and sends results to your phone over Bluetooth. You get more systems, VIN-matched repair reports and live data as you drive.
The trade-off is that you need a charged phone with the app installed.
What to expect from each
Handhelds are cheaper and simpler. Phone adapters reach more systems and give you repair guidance.
A tablet tool like the TOPDON goes further still, with active tests and reset services. Pick the level that matches the faults you plan to chase.
Do you need ABS and airbag codes?
No, not for a basic check engine light. You need ABS and airbag coverage only when those warning lights come on.
Engine-only scanners
The MOTOPOWER, VDIAGTOOL VD10, Foxwell NT301, ANCEL AD310 and Autel AL319 read engine and emission codes. They clear the check engine light after a repair.
That covers the most common fault a driver faces.
Four-system and full-system scanners
The Foxwell NT604 Elite reads engine, ABS, SRS and transmission codes. The BlueDriver adds TPMS on supported vehicles.
The TOPDON AD900 Lite scans every available module. Choose one of these when an airbag or ABS light is part of your problem.
The cost of getting it wrong
A cheap engine-only reader can't clear an ABS light because it never reads that module. If you know you'll face those systems, buy the coverage now rather than buying twice.
The same logic applies to reset services: the Foxwell NT604 Elite reads codes but can't perform an oil reset or EPB reset, while the TOPDON can.
Which scanner fits your budget tier?
Budget, mid-range and premium tiers cover three different jobs. Match the tier to the work you'll actually do.
Budget tier: engine codes only
The MOTOPOWER MP69033 and VDIAGTOOL VD10 handle engine codes, live data and readiness checks. The ANCEL AD310 and Autel AL319 do the same core job with fewer extras.
Pick this tier for a single car and a check engine light.
Mid-range tier: four systems and battery checks
The Innova 5210 adds a battery and alternator tester plus ABS coverage where supported. The Foxwell NT604 Elite brings four-system scanning to a handheld.
The BlueDriver puts enhanced codes and repair reports on your phone. These tools fit a driveway mechanic who owns more than one car or wants to check a used one before buying.
Premium tier: full-system and active tests
The TOPDON AD900 Lite is the shop-grade option. It scans all modules, runs bidirectional tests and handles 8 reset services.
Buy this tier only if you work on several vehicles or run a repair business.
Do gas and diesel vehicles need different scanners?
No, most light vehicles use the same OBD2 port and protocol. The scanner choice depends on the systems you need to reach, not the fuel type.
A gas car from 1996 or newer uses standard OBD2. A light diesel with OBD2 uses the same port.
The MOTOPOWER and VDIAGTOOL read both.
The split comes with heavy-duty and older diesels. Those may use manufacturer-specific protocols, and many basic readers won't connect.
Confirm the protocol before buying for a work truck. The BlueDriver covers select light-duty diesels and enhanced makes, so it's the safer bet when your truck sits in that group.
The TOPDON adds DPF regeneration and other diesel-friendly resets, though its DTC repair guide is limited to certain years and brands.
Which OBD2 scanner for gas and diesel should you buy?
The MOTOPOWER MP69033 is the best OBD2 scanner for gas and diesel for most people. It reads and clears engine codes on 1996 and newer OBD2 cars and light trucks for a low price, and its built-in code library means you don't need an online lookup.
Pick the BlueDriver if ABS, SRS or TPMS codes matter and you're happy using your phone. Pick the TOPDON AD900 Lite for full-system diagnostics and active tests in a shop.
For a Ford 7.3 diesel or a VW or Audi, check our make-specific guides first, including the OBD2 scanner for VW and Audi.
If you only need smog readiness, the Foxwell NT301 gives you a one-button answer. For everything else, start with the MOTOPOWER and add a deeper tool when a light appears that it can't read.
Our top 3 picks at a glance
-
1
Best for most gas and diesel drivers
MOTOPOWER MP69033 Car OBD2 Scanner Code Reader
9.7/10 our score
See it on Amazon -
2
Best for first-time DIYers
VDIAGTOOL VD10 OBD2 Scanner Check Engine Code
9.1/10 our score
See it on Amazon -
3
Frequently asked questions
Will a gas OBD2 scanner work on a diesel truck?
A scanner works on a diesel only if the truck uses the OBD2 protocol. The MOTOPOWER, VDIAGTOOL and Foxwell NT301 support all standard OBDII protocols.
Many older heavy-duty diesels use different systems, so check your truck's year and port before buying.
Do I need a scanner with live data for a diesel?
Yes, live data helps on a diesel because it shows sensor readings such as RPM, coolant temperature and fuel trims while the engine runs. The Foxwell NT301 graphs this data.
Basic readers like the ANCEL AD310 show it as numbers only.
Can a cheap OBD2 scanner clear a check engine light?
Yes. The MOTOPOWER MP69033 and VDIAGTOOL VD10 both read and clear engine codes.
Clear the code only after the fault is repaired, or it will come back.
A scanner cannot fix the underlying problem.
Which scanner reads ABS and airbag codes on a diesel truck?
The BlueDriver reads ABS, SRS, TPMS and transmission codes on supported vehicles, including select light-duty diesels. The Foxwell NT604 Elite also scans engine, ABS, SRS and transmission systems.
Coverage varies by make, model and year.
Is a phone app scanner good enough for diesel diagnostics?
A phone app scanner like the BlueDriver works well for engine, ABS and SRS codes on supported vehicles. For full-system diagnostics and active tests on a diesel, a tablet tool like the TOPDON AD900 Lite gives you more module coverage and reset functions.
