Best Audi Diagnostic OBD2 Tool & Apps Review in 2023

If you want to detect most troubles with your car quickly, then getting the right obd2 scan tool is vital. In this review, we’re going to look at the best Audi diagnostic tool on the market. Audi/VW is one of the biggest motor companies in the world. Suppose you own several Audi/VW cars or you’re a mechanic who specializes in repairing and maintaining Audi vehicles. In that case, you should pick a quality and perfect scanner for your car from our list below.

Take your time and select the best automotive diagnostic scanner for your Audi vehicle model. A good scan tool should be durable, accurate, and easy to use. Apart from covering Audi/VW vehicles, these scanners also cover vehicles such as Lamborghini, Seat, Bentley, and Skoda.

3 Best Audi Diagnostic Tools Comparison Chart

Most Selling 10 Best Audi Diagnostic Tool Reviews 2023

Here is the list of the best Audi diagnostic tools:

Launch Scan Tool CRP129X OBD2 Scanner

The first Audi scan tool that you should consider having is the Launch Scan tool CRP129X. This scanner is compact and easy to use. Thanks to the intuitive user interface that features both a touchscreen and clearly labeled buttons. It is also small and good-looking. Apart from that, you can use it to diagnose all the major vehicle systems, including SRS, engine, ABS, and Transmission systems.

Technical Specifications of the LAUNCH Scan Tool CRP129X OBD2 Scanner Automotive Code Reader

Features	Launch crp129X
Works:	Over 40 OBDII 1996 US-based, 2000 European-based, and newer OBD2/EOBD protocol vehicles
Screen:	4” TFT LCD True Colour Screen
Live data:	Record, save, and playback up to 8 hours
Read vehicle information:	VIN, CIN, and CVN
O2 (Lambda) sensor test:	Yes
EVAP system test:	Yes
I/M readiness test:	Yes
View freeze frame data:	Yes
View live diagnostic data in the graph:	Yes
Clear DTCs:	Yes
Read current, pending, and permanent DTCs:	Yes
Enhanced help function:	Yes
Print data via PC:	Yes
Oil Lamp Reset:	Yes
Input voltage range:	9-18V
Connection:	Standard 16PIN OBD Diagnostic Interface
Engine oil lamp reset:	Yes
ENG/AT/ABS/SRS EPB SAS:	Yes
Working Temperature:	-0°C ~ 50 °C
Storage Temperature:	-20 °C ~ 70 °C
Software Update Option:	Yes
Languages support:	3 languages supported. English, Spanish & French
Vehicle Coverage:	Suzuki, Infiniti, Usaford, Mazda, Gm, Euroford, Chrysler, Volvo, Renault, Jaguar, Toyota, Daewoo, Jpisuzu, Acura, Opel, Saab, Dacia, Landrover, Benz, Lexus, Lancia, Romeo, Fiat, Vauxhall, Seat, VW, Peugeot, Citroen, Skoda, Hyundai, Porsche, Subaru, Mitsubishi, Sprinter, Honda, BMW, Kia, Mini, Audi, Nissan, Smart, Eastford, Holden, etc.
Warranty:	One year warranty
Price:	Check Today’s Price

Additionally, the scan tool performs several special functions, such as SAS reset, oil reset, TPMS service, throttle adaptation, and EPB service. After getting the inspection report, you don’t have to do anything, as it will print it automatically. Also, you can update the device easily via Wi-Fi. Thus, it is one of the best obd2 scanners for Audi.

Besides diagnosing your Audi/VW car model, the unit can also be utilized on 50+ other vehicle makes and models. And with 9 languages to choose from, this scanner can be used all over the world.

Pros:

• It is compatible with most 1996, and the later vehicle makes and models
• Launch CRP129X has an AutoVin scan function
• It automatically prints inspection reports
• The OBD2 comes with free lifetime upgrades
• It is easy to use with the well-labeled buttons and touchscreen
• Multilingual menu for worldwide usage
• It has a 12-month warranty

Cons:

• Check for compatibility before buying
• It has to be connected to a power source to function.

Autel Scanner MaxiCheck Pro Diagnostic Tool

The Autel scanner MaxiCheck Pro diagnostic scan tool is another exceptional Audi scan tool on the market. It is perfect for auto bleeding but can as well as be utilized for oil light reset, BMS reset, ABS, EPB service, DPF, ABS brake bleeding, read/erase DPF system codes, particulate filter regeneration, and much more. If you are looking for a smart obd2 scanner, buy this Autel Maxicheck, one of the best Audi diagnostic tools on the market.

Technical Specifications of the Autel Maxicheck Pro OBD2 Diagnostic Tool

Features	Autel Maxicheck Pro
Works:	Most vehicle Year under 2019 or older vehicles
Display:	TFT color display(320 x 240 dpi)
ABS/EPB/SRS/SAS/Airbag/DPF/BMS:	Yes
Opens & Closes Electronic Brake Calipers:	Yes
Resets the Oil Service Light:	Yes
View, graph, record, and playback OBD-II live data:	Yes
Multilingual Support:	Yes
External Power:	12.0 to 18.0 V power provided via vehicle battery or adapter
Turn off the ECU and brake warning light:	Yes
Reads, Records, and Plays Back OBD2 Live Data Graphing:	Yes
Resets Steering Angle Sensors(SAS):	Yes
ABS, SRS Coverage for 50+ Vehicle Makes:	U.S. Domestic, Asian & European
Sets Inspection Mileage:	Yes
ABS Bi-directional Functionality:	Yes
Operating Temperature:	0°C to 60°C (32°F to 140 °F)
Storage Temperature:	-20°C to 70°C (-4°F to 158 °F)
Warranty:	Limited One Year Warranty
Software Update:	One-year free online software updates
Price:	Check Today’s Price

The scanner features a sleek and intuitive user interface for ease of use. The buttons are clearly labeled for quick use, and the screen displays all the tests’ outcomes. It is also compact with an excellent rubber grip for holding the unit properly.

Nonetheless, the scan tool has compatibility problems, and that’s why you need to ensure that it is compatible with your Audi car model and year. It is recommended for use on the Audi car up to the year 2015. The good news is that it has a free lifetime update, which means that you will have the latest software to handle the most recent car models.

Pros:

• Covers extensive functions
• Lifetime free software update
• Compatible with most 1996 and newer vehicles
• DTC lookup
• Read and erase error codes
• View vehicle information

Cons:

• It has compatibility issues, and that’s why you need to confirm that your car’s make and model are compatible.

Bluedriver LSB2 Bluetooth Pro OBD2 Scanner

The Bluedriver LSB2 Bluetooth Pro scan tool is among the best Bluetooth scanners on the market. This is a compact and portable device that you can carry to and from your garage easily. Also, you can leave it plugged into your vehicle as it doesn’t use up any power. However, you will have to download the Blue Driver app in order to start using it.

Technical Specifications of the BlueDriver LSB2 Bluetooth Pro OBDII Scan Tool for iPhone & Android

Features	BlueDriver LSB2
Live Data:	Display multiple PIDs as a graph, gauge, or digital readout (or export the log to a file)
Freeze Frame:	Vehicle snapshot when a code is stored
Read and Clear CEL Codes:	Yes(Confirmed, Pending, and Permanent for all makes)
Works:	ALL 1996 and newer vehicles
Check Engine Light:	Yes
Repair Reports:	Code Definition, Possible Causes, Reported Fixes (Vehicle-specific for each DTC)
Modes:	6 (Advanced test results)
Airbag, ABS Check:	Yes
Vehicle Coverage:	GM: including Chevrolet, GMC, Buick, Cadillac, Saturn, Pontiac, etc. Ford: including Ford, Mercury &  Lincoln Chrysler: including Chrysler, Jeep, Dodge, Ram, & Plymouth Toyota: including Toyota, Lexus & Scion Nissan: including Nissan, Infiniti & Renault BMW brands sold in North America: including BMW & Mini (2005 models & newer) Honda brands sold in North America: including Honda and Acura (2003 models & newer) Volkswagen brands sold in North America: Audi, including VW, Bentley, and Lamborghini
Software Update:	Free updates
Warranty:	1-year warranty
Price:	Check Today’s Price

But unlike most Bluetooth scanners on the market, you cannot use third-party apps. Also, it only runs on Android and iOS devices. Of course, this is with the exclusion of the iPad Pro and the iOS 11x. Additionally, the scan tool can perform several functions, such as read and clear enhanced codes, read and clear check engine light, perform a smog check, repair reports, and freeze frame data.

Overall, this is a compact and affordable scanner that most car enthusiasts and DIYers will love having.

Pros:

• Straightforward to use
• It can read and clear check engine light
• Extensive vehicle coverage
• It performs a broader range of functions
• The Identifix database helps you to find verified fixes
• It helps you to view live data

Cons:

• It is not compatible with all iOS devices, such as iPad Pro and iOS 11x
• It doesn’t support ABS and transmission for all vehicles

Autophix Car Code Reader for VW/Audi/Skoda/Seat

The Autophix is one of the best scanners for drivers and mechanics looking for a unique Audi scan tool. Built specifically for Audi, VW, Skoda, and Seat, this is a must-have scanner for Audi car owners or technicians.

Similar: Autophix 7910 Review [BMW Diagnostic Scanner Tool ]

It is sturdily made of a rugged drop-proof case to withstand harsh conditions. It also has a firm grip for ease of handling. Additionally, the scan tool features a 2.8-inch TFT 262k true color LCD display screen for showing results.

Technical Specifications of the Enhanced AP7610 Multi-System Scanner

Features	Autophix 7610 Car Code Reader
Full OBDII functions:	Read Fault Codes, Erase Fault Codes, Read Datastream, Vehicle Information, and EVAP test.
I/M Readiness STATUS:	Yes
Reads freeze frame data:	Yes
Display Live Data:	Yes
Read/Clears codes:	Yes
Vehicle Info Retrieval:	Yes
Operating Voltage	12 Volts
OBDII Protocol:	ISO9141, KWP2000, J1850 PWM, J1850 VPW, and CAN
Multilingual menu options & code definitions:	English, German, French, Spanish, Finnish, Dutch, Russian, and Portuguese
Dimensions:	10.2 x 7.4 x 1.8 inches
Weight:	1.13 pounds
LCD Display:	2. 8″ TFT 262K true color
Autophix Vehicle Coverage:	Works on most BMW vehicles sold in the US with the model year 1996 – 2019.
Steering Angle Calibration:	Yes
Price:	Check Today’s Price

Besides, it has a silicon keypad with clearly labeled buttons for ease of use. So, even if you’re a newbie, you will have an easy time using the scanner. What’s more, the long cable allows you to diagnose the problems facing your car while seated in the driver’s seat.

Furthermore, you can use it to diagnose functions such as throttle learning, reset the oil, throttle position adaptation, read and erase error codes, retrieve VIN information, tire pressure reset, and more.

Pros:

• Durable and compact construction
• It reads and clears error codes
• Autophix has a clear, backlit LCD display for a straightforward interpretation of results.
• It uses car power; thus, it doesn’t require a battery
• Extensive vehicle coverage of most 1996 and later vehicles
• It comes with lifetime free software updates

Cons:

• It is slightly expensive

Autel Maxidas DS808 Automotive best Audi Diagnostic Tool

The Autel Maxidas DS808 scan tool is among the top scanners for professional technicians on the market. This is a better version of the Autel DS708 scanner. The DS808 scan tool features some of the most usual service functions, such as EPB service, TPMS programming, DPF regeneration service, oil reset service, ABS/SRS service, and SAS calibration service.

Technical Specifications of the Autel Maxidas DS808 OBD2 Scanner

Features	Autel Maxidas DS808
Processor:	Cortex-A9 processor (1.5 GHz)
ABS, SRS, TPMS, EPB, SAS, DPF, BMS Resets:	Yes
Operating System:	Android 4.4.4
Memory:	32GB
Display:	7-inch LCD capacitive touchscreen with 1024×600 resolution
Sensors:	Ambient light sensor for brightness auto changing
Operating Temp:	-10 to 60°C(14 to 140°F)
Storage Temp:	-20 to 70°C (-4 to 158°F)
Audio Input/Output:	• Input: N/A • Output: buzzer
Connectivity:	Mini USB 2.0 • USB 2.0 • Wi-Fi • Micro SD card (supports up to 32GB)
Power and Battery:	3.7 V/3200 mAh lithium-polymer battery • Charges via 5 VDC power supply
Oil Reset:	Yes
Tested Battery Life:	Around 4.5 hours of continuous use
Battery Charging Input:	5 V/1.5 A
Power Consumption:	500 mA (LCD on with default brightness, Wi-Fi on) @3.7 V
Vehicle Coverage:	More than 80 U.S., Asian and European vehicle
Models:	Acura, Audi, BMW, Bentley, Benz, Bugatti, Citroen, Chrysler, Dodge, Daewoo, Ford, Fiat, Gm, Hyundai, GMC, Infiniti, Holden, Honda, Isuzu, Jaguar, Kia, Land Rover, Jeep, Lexus, Maybach, Nissan, Mazda, Mini, Mitsubishi, Opel, Saab, Peugeot, Porsche, Renault, Scion, Seat, Smart, Suzuki, Skoda, Sprinter, Subaru, Toyota, Volvo, Vauxhall, Volkswagen, VW, etc.
Update Option:	Free Online Update
Weight:	788 g (2.42 lb.)
Warranty:	12-month warranty for any product problems
Price:	Check Today’s Price

Furthermore, it performs other functions like reading and clearing error codes, live data, adaptation, active tests, matching, and ECU information. Also, it boasts a smart AutoVin function that allows you to quickly identify the car you want to diagnose. And with the Cloud-based MaxiFix and Shop Manager functions, you will always have a great platform to help you know the meaning of different trouble codes.

What’s more, the unit is easy to use as it features a large and crystal-clear LED screen. It is also fast and accurate in operation as it comes with Android 4.4.4 and an A9 processor. Hence, you can use it to diagnose many vehicles quickly.

Pros:

• Crystal clear display
• Extensive vehicle coverage
• Performs basic, special, and advanced functions
• Wireless connection
• Fast and accurate
• Automatic software update
• One year of free updates

Cons:

• It offers free software updates for only one year

Fixd OBD2 Professional Bluetooth Scan Tool For iOS and Android

The Fixd OBD2 scanner is a sleek and compact device that is perfect for drivers. This Bluetooth scanner works when the car is ignited. In short, it depends on the car’s power to run. Also, you will have to download the Fixd app and operate it from your phone. The device can also read and erase error codes and perform other essential functions.

An exciting feature of this device is that it can diagnose 5 cars at the same time. So, it is perfect for tracking family vehicles and knowing their state. With the Identifix database, you will have access to more than 10,000 manufacturer-specific and enhanced trouble codes.

Technical Specifications of the FIXD Professional Bluetooth Code Reader

Features	FIXD obd2
Wear Items:	Keep track of battery life, tire tread, and wipers
I/M Readiness STATUS:	Yes
Reads freeze frame data:	Yes
Display Live Data:	Yes
Read/Clears codes:	Yes
Vehicle Info Retrieval:	Yes
Read Enhanced Codes:	Yes
Diagnostic Reports:	Code Definition, simplified explanation with additional resources for repairs
Multilingual menu options & code definitions:	English, German, French, Spanish, Finnish, Dutch, Russian, and Portuguese
Dimensions:	1.5 x 0.5 x 1.8 inches
Weight:	0.96 ounces
Mileage Detection:	Yes
FIXD Vehicle Coverage:	Works on all gas-powered vehicles made after 1996 (no all-electric or diesel)
Multi-Vehicle Control:	3-year warranty
Price:	Check Today’s Price

However, this is not the best scanner for professional mechanics as it won’t work on diesel and electric-powered vehicles. But, if you want quick fixing for simple issues, then buy this best Audi diagnostic tool.

Pros:

• Compact and portable scanner
• It reads and clears error codes
• Fixd provides estimated repair costs
• It can connect up to 5 cards at once
• Extensive vehicle coverage
• View live data
• Straightforward to install and use

Cons:

• It is not compatible with diesel and electric-powered vehicles
• It needs the car’s power to operate

Ancel VD500 OBD2 Diagnostic Scanner for Volkswagen/Audi/Skoda Seat/Diagnosis

If you want an affordable and reliable Audi scan tool, then you will like the Ancel VD500 scanner. This compact and sturdy scanner works on both Audi and VW vehicles. It can also be used on most 12V 16-Pin Skoda and Seat vehicles. It can also work on 12V cars and newer light trucks manufactured from 1996.

The device can be utilized to diagnose several car systems such as ABS, SAS, TPMS, and much more. Also, it supports IMMO, which means that you can protect your car even if you lose the keys. Besides, the EPB reset buttons ensure that your car does not throttle when you’re driving fast.

Technical Specifications of the ANCEL VD500 OBD II Diagnostic Scanner

Features	Ancel VD500
Erase Fault Code:	Yes
I/M Readiness STATUS:	Yes
Reads freeze frame data:	Yes
Display Live Data:	Yes
Read/Clears codes:	Yes
Vehicle Info Retrieval:	Yes
TP Position Check:	Yes
Voltage:	12
Multilingual menu options & code definitions:	English, German, French, Spanish, Finnish, Dutch, Russian, and Portuguese
Dimensions:	9.2 x 6.8 x 1.5 inches
Weight:	12 ounces
Equipped with	with a 2. 5 feet-long cable
Ancel VD500 Vehicle Coverage:	Must be 12V cars and light trucks (non-electric) manufactured in 1996 or later that are OBD II-compliant with 16-Pin OBD II protocols (J1850 VPM, J1850PWM, ISO9141, KWP 2000, and CAN).
16-Pin OBD II protocols:	(J1850 VPM, J1850PWM, ISO9141, KWP 2000, and CAN).
Price:	Check Today’s Price

On top of the exceptional features that this scanner boasts of, it offers users the option of either choosing English or German as the display languages. What’s more, you can update the device for free to get the latest software and diagnose the most recent Audi car models.

Pros:

• Compact and sturdy construction
• Performs a full system diagnosis
• Reads and clears error codes
• It is affordable
• Easy to use

Cons:

• You cannot stream live data
• It lacks free frame data

XTOOL V401 Code Reader Diagnostic Tool

The XTOOL V401 code reader is also ideal for Audi and VW vehicle makes and models. It boasts some exceptional functions, such as oil reset, ABS bleeding, and SRS reading. At such a perfect price, this is an excellent bargain for Audi car owners. Besides, it is sleek and compact for ease of use and storage.

Technical Specifications of the XTOOL V401 Code Reader (for VW/Audi/Seat/Skoda)

Features	XTOOL V401
Retrieve controller information:	Yes
I/M Readiness STATUS:	Yes
Reads freeze frame data:	Yes
Display Live Data:	Yes
Read/Clears codes:	Yes
Vehicle Info Retrieval:	Yes
Operating Voltage	12 Volts
OBDII Protocol:	CAN, J1850, ISO9141, and KWP2000
Multilingual menu options & code definitions:	English, German, French, Spanish, Finnish, Dutch, Russian, and Portuguese
Dimensions:	8.8 x 3.9 x 1.4 inches
Weight:	1.2 pounds
Wattage:	3 watts
Ancel AD310 Vehicle Coverage:	Works on most 1996 US-Based, 2000 EU-Based and Asian cars, and newer OBD II & CAN domestic or import vehicles
Compatibility:	VW/AUDI/SEAT/SKODA
Price:	Check Today’s Price

If you want to do more than just read and erase error codes, then you will be happy to know that it supports different protocols such as CAN, J1850, ISO9141, and KWP2000. To turn on the scanner, you will have to plug it into the OBD2 port. It is easy to use, and the hotkey buttons are clearly labeled for quick diagnosis. It is one of the best Audi diagnostic tools that you can buy.

Aside from covering Audi and Volkswagen car makes, you can also use it on Skoda and Seat vehicle models.

Pros:

• Elegant and compact scanner
• Covers different vehicles
• It is affordable
• It is simple to use
• Quick to retrieve pin codes
• It updates automatically
• It comes with a 2-year warranty

Cons:

• It relies on the vehicle’s power to run

Foxwell NT510 Elite Automotive Full System Diagnostic Scanner

With the ability to offer a comprehensive diagnosis on all electronic systems, the Foxwell NT510 elite scan tool is suitable for Audi and Volkswagen car owners. The systems include the engine, SAS, ABS, and TPS. Aside from that, this device will give you data about freeze frames and live data. You can also diagnose vehicle makes and models with this tool: Lamborghini, Bentley, Skoda, Bugatti, and Skoda.

Technical Specifications of the Foxwell NT510 OBD-II Diagnostic Scanner

Features	Foxwell NT510
ABS/SRS/EPB:	Yes
Live data graphing:	Yes
Works:	ALL 1987-1996 and later vehicles
Display:	2.8” TFT color screen and menu-driven operations
Resets oil service light:	Yes
Views freeze frame data:	Yes
Reads and stores Data:	Yes
Performs special functions, coding, and security access:	Yes
Active tests on systems and components:	Yes
Playbacks live sensor data:	Yes
Diagnoses EPB caliper functionality:	Yes
Requests and records live sensor data:	Yes
Software Update:	Lifetime free update
Get transmission codes:	Yes
Vehicle Coverage:	All Models of BMW
Price:	Check Today’s Price

A peculiar function of this scanner is the bi-directional test. This test enables the user to temporarily activate or control a car system, configure certain parts after a repair, and allows to re-calibrate.

Additionally, the Foxwell NT510 is simple to use as it features clear hotkeys and a 2.8-inch TFT color screen for ease of interpreting results. With a one-year warranty, this is a beautiful scanner to invest in.

Pros:

• Durable construction and ergonomic design
• Reads and clears trouble codes
• It assists in retrieving ECU information
• It has a multilingual menu
• The TF memory card helps in storing data
• It can be upgraded to cover the latest vehicle models.

Cons:

• It is slightly expensive when compared to other scan tools on this list
• It has compatibility problems

Carista OBD2 Bluetooth Adapter and App

The Carista OBD2 scanner is ideal for Audi and Volkswagen vehicle makes and models. Like most Bluetooth scanners on the market, this unit is easy to use by connecting the adapter to the port and downloading an app. The good news is that this device doesn’t limit you to the type of app that you install. You can install any Caritas OBD2 app from both iOS and Android App Stores. Furthermore, it also works with all ELM 327 apps on Windows/Android and Mac that utilize Bluetooth connection.

Technical Specifications of the Carista obd2 Bluetooth adapter scanner

Features	Carista Bluetooth OBD2 Adapter
Works:	iOS and Android via Bluetooth LE
TPMS/ABS/VSC/TRAC/ Airbag:	Yes
Check Engine Light:	Yes
Service Reset:	Yes
Launch Control Counter:	Yes
EPB retraction tool:	Yes
Dimensions:	2.8 x 2.8 x 1.6 inches
Free Trial:	1-month free trial of all paid functionality in the Carista app
Detailed ECU information:	Yes
Weight:	1.44 ounces
Supported On Certain Models:	Audi, BMW, Lexus, Mini, Scion, Toyota, VW, etc…
Price:	Check Today’s Price

What’s more, the scanner performs a broader range of services such as ECU information view, EPB retraction, read and erasing faults codes for different systems such as ABS, transmission, and airbag. Also, it assists in viewing real-time data for the engine load, temperature, and speed of the vehicle.

Get to test this Bluetooth scanner with one month of a free trial of paid Carista app features.

Pros:

• It is easy to use
• It offers extensive functions
• Carista obd2 allows third-party applications to  use
• It is reliable in performance
• It features repair guides free of charge

Cons:

• It may be costly in the long run with the in-app purchases
• Working with specific vehicles makes

2 Best Audi Car Diagnostic Apps

FIXD OBD2
Operating System (OS): iPhone, iPad, and Android devices
ABS/Airbag/Transmission codes: Yes
Mileage Detection: Yes
SRS: No
Free Subscription: Yes
Language: Only English
Smog Test: No
TPMS Service: Yes
Bluetooth Connectivity: Yes
Ideal For: Beginners

OBD Fusion

• Real-time graphing
• MPG calculation
• Check engine misfires, transmission, and oil temperature.
• Tracking fuel economy
• Show battery voltage
• Display Engine Torque, Engine Power, Turbo Boost pressure, and A/F ratio
• Read freeze frame data
• Emissions readiness for each US state
• Oxygen Sensor Results
• GPS tracking
• Store full diagnostic report
• Option to select the connected ECU
• Fault code definitions
• Bluetooth and Wi-Fi support

Bottom line

If you’re a proud owner of an Audi vehicle, you should consider picking one of the best Audi diagnostic tools. The scanners that we’ve selected are some of the best and boast exceptional features and functions. Depending on your needs and budget, you will find a scanner that fits your requirements. It doesn’t matter if you own several Audi cars or are a professional mechanic or technician who handles many Audi car brands; you will find a scanner that best suits your needs.

FAQ

Question: What action should I take if the check engine light turns off before I reach the car repair shop?
Answer: If the check engine light disappears independently, you should do nothing. This is a sign that the problem that caused the light to come on has been addressed. Hence, it should not be taken as a faulty OBD2 system. It may also be a sign that a loose gas cap was tightened or a fouled spark plug was cleared. And until the light comes on, your car doesn’t require any special attention.

Question: What problem should a diagnostic scanner detect?
Answer: This depends on the type and quality of the diagnostic scanner. If the unit is advanced, it will cover basic, special, and advanced functions. But if it’s not, then it will only cover basic and a few special functions. Some of the tests that a scan tool covers include read and erase codes, live data, freeze frame data, oil reset, and much more.