obd2 scanner with case relearn

Best Obd2 Scanner With Relearn in 2021

There are few things in this world that are more annoying than when the “check engine” light appears on your car’s dashboard. Not only do you have engine problems, but you don’t even know what problems you’re running into.

For those who are less inclined to the mechanics of a car, this can be a real puzzle. In most cases, the result is that you have to take your car to a mechanic just to find out what’s wrong. Obviously, this can be a waste of time and money.

However, there is a device that will allow you to find the source of your “check engine” problems. This device is an OBD2 car scanner. There are quite a few OBD2 scanners currently on the market, and you want to make sure you pick one that is high quality.

Editor’s Recommendation on top 5 Obd2 Scanner With Relearn

10 Most Popular OBD2 Scanners

1. LAUNCH OBD2 Scanner CRP123E Engine ABS SRS Transmission Code Reader

[2021 New Elite]LAUNCH OBD2 Scanner CRP123E- Engine/ABS/SRS/Transmission Diagnostic Scan Tool with Battery Test, AutoVIN,5' Touchscreen WiFi Free Update, Car Code Reader for All Cars

Whether you’re a professional or an amateur, this scanner could be the apple of the eye for all vehicle owners. This device is an advanced tool that builds with Android 7.2 and a touchscreen display. This device can auto diagnose your car’s Engine, Transmission, ABS, SRS, and 10 modes of OBD testing.

Getting the comprehensive health report of your vehicle is a piece of cake. It can show the data in 3 different ways to understand conveniently and send it to your email through wifi. Also, it stores and clears the fault codes.


  • Wide range of compatibility
  • Prolonged battery backup
  • Easy to use
  • Supports 9 language
  • 5 years warranty


  • Requires Wifi to access all feature

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2. Autel MaxiTPMS TS501 TPMS Relearn Tool OBD2 Scanner

Autel MaxiTPMS TS501 TPMS Relearn Tool 2021 Newest, Activate/Relearn All Brand Sensors & Program MX-Sersors (315/433MHz), Key Fob Testing, Upgraded Version of TS401/TS408

If you’re looking for a perfect TPMS and relearn tool, then probably you’ve got the right one. This device has a specialty in activating OEM/Universal TPMS sensors. Also, it allows the user to get access to the ECU and reprogram the sensor IDs.

The TPMS scan feature and 3 relearning options allow this device to accomplish both jobs accurately and effortlessly. The unique feature of this device is cloning sensor IDs and checking key FOB for transmission. Moreover, this device performs basic and detailed diagnosis operations.


  • Easy to use
  • Most accurate and fast result
  • Reduces repair cost
  • Wide range of compatibility
  • Supports multiple languages


  • Shows how to relearn but can’t perform it
  • Incompetent for few vehicles

Buy on Amazon

3. Autel AutoLink AL519 OBD2 Scanner Enhanced Mode

Autel AutoLink AL519 OBD2 Scanner Enhanced Mode 6 Car Diagnostic Tool Check Engine Code Reader CAN Scan Tool, Advanced Ver. of AL319

There’re very few tools out there that can do several tasks, and this device is one of them. It’s a compact device with strong build quality and a user-friendly interface. In addition, this device comes with a TFT color display and speaker.

It can perform several tasks, including complete OBD2 test, turn off ‘check engine’s light, keep track of live sensor data, show freeze frame data, read, store and remove fault codes, and so on without a hitch. You’ll find manufacturer-specific, generic codes, DTC Lookup and DTC Breaker. This device interprets the codes and shows suggestions about fault codes to the users.


  • Easy to use
  • Inexpensive
  • versatile
  • Has a backup battery


  • Lacks in some advanced features

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4. LAUNCH OBD2 Scanner -CRP129E Scan Tool

LAUNCH OBD2 Scanner-2021 New CRP129E Scan Tool for TCM Eng ABS SRS Code Reader, Oil/EPB/TPMS/SAS/Throttle Body Reset Diagnostic Tool with Carry Bag, AutoVIN WiFi Update,Upgraded of CRP123

Launch is doing great when it comes to the OBD2 scanner. Like CRP123E, this one is also a smart device. Most of the features found the same in these 2 models. This OBD2 scanner diagnoses issues in 4 main systems and does complete OBDII testing. Also, it runs the 5 major sensor reset operations, and it’s a unique feature.

You can get live voltage information of the battery too through this monster. CRP123E supports significant protocols like OBD, EOBD, JOBD, and KOBD. Last but not least, it reads, removes codes, and provides an expert’s solution.


  • Fast and accurate result
  • Can diagnose most problems
  • Lifetime free update through WiFi
  • Supports multiple languages
  • 5 years long warranty


  • Expensive

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5. thinkcar Code Reader TS609 Obd2 Scanner

thinkcar Code Reader TS609 Obd2 Scanner for Engine Transmission ABS SRS Diagnostic Tool with Oil/EPB/SAS/TPMS/Throttle Body Reset/Injector Coding/Reset BMS/Reset DPF -Free Updates-EL-50448 Gift

Are you looking for a device that can thoroughly access the ECU? Well, you’ve got one. This OBD2 scanner does the same and diagnoses engine, transmission, ABS, and airbag system issues. However, it can turn off the check engine light. Moreover, it scans 8 major sensors, performs onboard monitor tests, and shows I/M readiness.

This device also does the job of a battery tester and shows real-time updates. To provide an accurate and fast result, it views VIN, CVN, and CIN. It reads, stores, and erases code. Also, this device shows a live data stream through 4-1 graphing and sends reports through email.


  • Does several tasks
  • Easy to operate
  • User-friendly
  • Supports 8 languages
  • 5 years warranty


  • Expensive

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6. INNOVA 3160RS Pro OBD2 Scanner/Car Code Reader with Live Data

INNOVA 3160RS Pro OBD2 Scanner/Car Code Reader with Live Data, ABS, SRS, Service Light Reset, EPB, and Network Scan

Nowadays, very few devices support both OBDI and OBDII, and this scanner is one of them. It accesses the vehicle’s ECU and diagnoses issues in 4 central systems. This tool provides a built-in emission readiness test. The 3 LED below the display indicates whether the vehicle passes the test or not.

Sometimes users can’t understand the severity of the DTC code. Well, this device will tell the users about it. The most interesting part is, it can check the battery health in hybrid vehicles. Also, it displays the live data and records the functionality.


  • Easy to use
  • You can get verified fixes through their app
  • Supports 3 languages


  • Expensive

If the engine doesn’t run, it needs a battery

Buy on Amazon

7. LAUNCH OBD2 Scanner CRP123 – Engine/ABS/SRS/Transmission Code Reader Car Diagnostic Scan Tool

LAUNCH OBD2 Scanner CRP123 - Engine/ABS/SRS/Transmission Code Reader Car Diagnostic Scan Tool,4 in 1 Live Data Stream Graph,Free Update + EL-50448 TPMS Tool

Launch OBD scanners always perform well, and like always, this device won’t dissatisfy the users. It runs several diagnostic operations in your vehicle’s system and tells you what to do. Of course, you can check the I/M readiness too. Also, it’ll let you solve the issues with the check engine light.

It provides live information through freeze frame data. Also, you can see live data graphically. When you don’t understand the code, just go through its DTC lookup. You’ll find the definition. This device performs advanced diagnosis by supporting generic, manufacturer-specific, and pending codes.


  • Wide range of compatibility
  • User-friendly interface
  • Mostly accurate and fast result
  • Supports multiple languages


  • Can’t get access to RPM

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8. KONNWEI KW650 6V 12V Car Battery Tester

KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover Father's Day Gift

When people look for a perfect battery tester, then comes the KONNWEI KW650. Whether the battery is 6V or 12V, this battery tester is compatible with both. After that, it’ll inform you of status- good, recharge, and replace.

This device follows several test standards when measuring your battery. Moreover, it supports different battery types. The compatibility doesn’t end in cars. You can also check the battery of boats, lawnmowers, etc. with it.

You can view graphical results and overall battery data through the color screen. This tester will show you the real-time voltage changes and diagnose problems.


  • Easy to use
  • Fast and most accurate result
  • Budget-friendly
  • Supports both in and out vehicle test


  • Doesn’t work in few models

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9. KONNWEI KW850 Car Diagnostic Tool

KONNWEI KW850 Professional OBD2 Scanner Auto Code Reader Diagnostic Check Engine Light Scan Tool for OBD II Cars After 1996 (Original)

Running diagnosis of  OBDII and EOBD functions for engine system, testing battery -Konnwei KW850 does both. It doesn’t end here. Turning off check engine light, running O2 sensor test, EVAP systems test, and on-board monitoring test- you can do all of them with this device.

As a battery tester, it monitors the engine’s real-time battery voltage, temperature, and RPM. The manufacturer inserted 8000 generic codes that allow you to diagnose the issues correctly. Moreover, you can see both numerical and graphical live data streams.


  • Compatible with both petrol and diesel vehicles
  • Easy to use
  • Do the job fast and accurately
  • Free storage case


  • It doesn’t support iOS
  • Can’t diagnose issues in ABS and SRS
  • Doesn’t work in heavy-duty vehicles

Buy on Amazon

10. NEXAS NL101 Full OBD2 Scanner

NEXAS NL101 OBD2 Scanner Check Engine Light Car Code Reader Diagnostic Scan Tool Fault Code Scanner with Battery Test for OBDII Car After 1996 [Upgrade Version] including Black Protective Case

From basic diagnosis to battery testing Nexas NL101 does all. You’ll find complete OBDII and EOBD functions in it. Whether you want to see or remove fault codes, you can do both. Also, it diagnoses battery issues and provides 6 warning tips. If you face issues with sensors, this device will let you know what’s happening.

Can’t interpret the error codes? Just go through its DTC lookup. It’ll enlighten you. Moreover, this device solves the issues with the check engine light and MIL. Lastly, this scanner finds out emission readiness status and informs you what to do.


  • Supports multiple languages
  • Free protection case
  • Easy to use
  • Inexpensive


  • Can’t solve ABS and SRS issues
  • Not compatible with few vehicle models

Buy on Amazon

Types of OBD2 scanners and how they work

OBD is short for “on-board diagnosis”. OBD2 is the second version of this hardware. The first version appeared in the early 1980s, but was limited to certain makes and models. OBD2 appeared in the mid-1990s with a universal port that allows one device to scan multiple car models. Vehicles from 1996 must be compatible with OBD2 scanners. When you buy an OBD2 scanner for home use, you are probably buying a handheld scanner. Professionals in repair shops, however, will want to make use of a computer-sized OBD2 scanner.

These larger scanners have powerful processors and work quickly, so you can perform many scans in one day. The scanners deliver the data through a couple of means. Some OBD2 scanners are wired: A cable runs from the OBD2 port in the vehicle to the scanner, where it delivers the data. Other scanners communicate data through a USB, Bluetooth, or WiFi connection. Connect this type of scanner with another device, such as a smartphone, tablet or laptop, to obtain the data.

Decrypt scanner information

All OBD2 scanners can generate error codes. However, understanding what to do with those error codes can be difficult with some scanners. High-end scanners will display troubleshooting information on the screen along with the error code. This simplifies the process of solving problems while saving time. If the troubleshooting information is not displayed on the screen, the device may allow you to connect to the Internet to find the data you need.

I KNEW IT? A professional-grade OBD2 scan tool can receive data from the car’s systems and send it to the systems. This allows for more extensive troubleshooting.

OBD2 scanner features

All handheld OBD2 scanners can read basic errors, generating the appropriate error codes. Scanners can also clear error lights. But if you want some additional features, here are some things to keep in mind.

Applications: Some OBD2 manufacturers create companion applications that accompany the hardware. With an app, error codes and data can be stored on a smartphone or tablet. The app can also tap for additional information on troubleshooting error code that is stored in the cloud.

Connector: The OBD2 scanner connector has a 16-pin plug. These pins are thin and delicate. If they are damaged, the scanner will no longer work. Some scanner cables have plastic protectors around the pins, keeping them secure, which is a nice feature. Always store the OBD2 scanner carefully to avoid unintentional damage.

Display screen: A handheld scanner with a large, sharp screen can display quite a bit of information. Some OBD2 scanners have a screen large enough to display both the error code and troubleshooting information.

I / M Preparation: If you live in a state where your vehicle must undergo regular inspections, you will want an OBD2 scanner with I / M function. I / M, short for inspection and maintenance, can measure vehicle systems to see if they’re ready for inspection testing.

Live data: If you want to measure a system while driving, you will need a scanner capable of measuring live data. Other scanners only work when the vehicle’s engine is not running.

Storage: If you want to remember the results of previous scans, look for an OBD2 scanner with a memory storage area. This can be useful for tracking errors as they evolve over time.

VIN Recovery: Some OBD2 scanners display the vehicle’s VIN number after scanning. Reading the scanned frame number allows you to compare it to the frame number in your vehicle’s documentation. This ensures that no one has tampered with the vehicle’s systems or changed the chassis number.

OBD2 scanner prices

Basic handheld OBD2 scanners can be purchased for a low price, typically € 20-50. These scanners, often called code readers, check for the most basic problems. If you just want a little information on hand when you visit the repair shop, this entry-level OBD2 scanner is a good choice. (They can also erase the error lights.)

However, an entry-level OBD2 scanner will not provide immediate troubleshooting information.

Mid-range OBD2 scanners work well for people who like to do some home repair. These vehicle scanners have the ability to retrieve data from previous scans, which can be useful for comparison purposes. Called scan tools, they can diagnose both basic and extensive problems, providing data for troubleshooting. Mid-range OBD2 scan tools cost between € 50 and € 150. The most expensive OBD2 scanners for amateur use cost between € 150 and € 1,000. Some professional-level models cost up to € 10,000. Models at the upper end of this range will not be handheld devices.

Expensive OBD2 scanning devices have the ability to add additional data to readings. For example, you can see the exact time the error code occurred, as well as any other errors that were occurring at the same time. Those who commonly do auto repairs will want a top-notch OBD2 scanner for the best results.

Guide to buy the best OBD2 scanner

OBD2 scanners are made to work with multiple vehicles makes and models, giving them amazing versatility. If you would like to diagnose vehicle problems on your own and are interested in obtaining an OBD2 scanner, read on for valuable information to help you make the right purchase.

For the fastest performance of an OBD2 scanner, look for one that is CAN compliant. CAN is used in most cars with 2004 and later models.


Connecting an OBD2 scanner to a vehicle is an easy process. Reading the codes does not require much technical knowledge either. Still, there are a few things you need to know ahead of time. We have compiled some tips to help you be more successful with your OBD2 scanner.

  • Know where to find the OBD2 port. Commonly, the port is located under the dash to the left of the steering column. The port can have a cover or a latch. If you can’t find the port, check the internet – there are multiple online sites that have the correct information for your make and model of vehicle.
  • Gently plug in the scanner. Don’t force it. If the scanner and port are properly aligned, they should be inserted with minimal force. Using too much force could damage the pins.
  • Know how far to turn the key. Some OBD2 scanners require you to start and run the car’s engine while scanning. Others require that you turn the key halfway to activate the vehicle’s power systems.
  • Have your data ready. Depending on the scanner, you may have to enter the make and model of your car before the unit starts scanning.
  • Plan how you will log error codes. Once the scan is complete, the codes will appear on the screen. You can write them, send them to a smartphone via wireless connection, or send them to a printer or laptop via USB.

Frequent questions

Q. Why would I want an OBD2 scanner? After all, I can’t fix my car by myself.

A. Having an OBD2 scanner at home is useful even for those with no mechanical background. When running the scanner, you may encounter error codes that give you an idea of ​​what is wrong with the vehicle. Then you can make an informed decision about whether the car should be taken to a mechanic immediately or if the problem can wait. Also, you will know if the repair shop is treating you fairly with respect to the proposed repairs.

Q. What vehicle problems can an OBD2 scanner detect?

A. An OBD2 scanner can detect any error code that could trigger a MIL (Malfunction Indicator Lamp) in the vehicle. These lights may include an engine check light, an oil error light, or a battery error light. The purpose of the MIL is to alert you to a problem. Using an OBD2 scanner, you can then identify the exact problem that caused the MIL.

Q. What do the OBD2 codes mean?

A. The error code displayed on the OBD2 screen follows a certain pattern. The first character is a letter meaning the area of ​​the vehicle with the error. “B” means a body problem, while “C” means a chassis problem. The numbers that make up the rest of the code more accurately point to the problem. Rather than trying to memorize codes, OBD2 scanners typically show the code’s meaning or connect it to an application that can define the code for you.