The Best check engine light tester of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best check engine light tester of 2022. Check our ranking below.

2,044 (random) Reviews Scanned

Rank No. #1

ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black)

CEL Doctor: The ANCEL AD310 is one of the best-selling OBD II scanners on the market and is recommended by Scotty Kilmer, a YouTuber and auto mechanic. It can easily determine the cause of the check engine light coming on, quickly read and clear diagnostic trouble codes, read live data & hard memory data, view freeze frame, I/M monitor readiness and collect vehicle information. Instead of taking car to mechanic shop, you can use it to check the trouble code and show code definition by yourself.
Sturdy and Compact: Equipped with a 2.5 foot cable made of very thick, flexible insulation. It is important to have a sturdy scanner as it can easily fall to the ground when working in a car. The AD310 OBD2 scanner is a well-constructed mechanic tool with a sleek design. It weighs 12 ounces and measures 8.9 x 6.9 x 1.4 inches. Thanks to its compact design and light weight, transporting the device is not a problem. The buttons are clearly labelled and the screen is large and displays results clearly.
Accurate Fast and Easy to Use: The AD310 scanner can help you or your mechanic understand if your car is in good condition, provides exceptionally accurate and fast results, reads and clears engine trouble codes in seconds. If you want to find out the cause of the check engine light, this device will let you know immediately and fix the problem right away without any car knowledge. No need for batteries or a charger, get power directly from the OBDII Data Link Connector in your vehicle.
OBDII Protocols and Car Compatibility: Many cheap scan tools do not really support all OBD2 protocols. This is not the case with the AD310 scanner as it can support all OBDII protocols such as KWP2000, J1850 VPW, ISO9141, J1850 PWM and CAN. This device also has extensive vehicle compatibility with 1996 US-based, 2000 EU-based and Asian cars, light trucks, SUVs, as well as newer OBD2 and CAN vehicles both domestic and foreign. Check compatibility with your vehicle model before purchasing.
Home Necessity and Worthy to Own: This is an excellent code reader to travel or home with as it weighs less and it is compact in design. You can easily slide it in your backpack as you head to the garage, or put it on the dashboard, this will be a great fit for you. The AD310 is not only portable, but also accurate and fast in performance. Moreover, it covers various car brands and is suitable for people who just need a code reader to check their car.

SaleRank No. #2

UMEIJA OBD2 Scanner with Upgrade Battery Tester - Diagnostic Tool for Cars That Check Engine Light & Emissions Readiness Read and Clears Vehicle Error Codes for All OBD II Protocol Vehicles Since 1996

Multi-Function: This code reader for cars and trucks is like a micro mechanic, which can quickly read and clear engine error codes, live data stream (with graphic display), view freeze frame, check MIL readiness status, read I/M monitoring readiness status and collect vehicle information, display vehicle indicators in detail. You can use it to check fault codes by yourself and display code definitions, understand the health of the vehicle, be fully prepared for going to the auto repair shop for car maintenance.
Wide Vehicle Compatibility: Multiple Uses - The OBD2 professional automatic scanner supports all OBDII protocols such as KWP2000, J1850 VPW, ISO9141, J1850 PWM and CAN.Works with most 1996 and newer US cars, 2000 EU and Asian cars, light trucks, SUVs, and newer OBD2 and CAN vehicles both at home and abroad. Please check compatibility with your model before purchasing. This car code reader supports multiple languages such as English, German, French, Spanish, Finnish, Dutch, Russian and Portuguese, making it an ideal choice for international users, deeply loved and highly recommended by customers worldwide.
Rugged and Compact Design: The OBD2 scanner is a compact and well-designed car parts. It weighs 12 ounces and measures 8.9 x 6.9 x 1.4 inches. It comes with a 2.5-foot heavy-duty cable with a standard 16-pin OBD connector. The cable is made of a very thick flexible insulation layer and is sturdy and durable. Since OBD2 scanners can easily fall to the ground while working in the car, the structural design of the scanner is very demanding, and this OBD2 scanner can well meet the customer's needs for sturdiness and compactness.
Accurate, Fast and Worth Having: The OBD2 code reader adopts an upgraded microprocessor, its powerful performance provides fast and accurate results and displays them on the screen, draws and records real-time vehicle sensor data, helps you understand the condition of the car, quickly diagnose and repair common car problems. 6 buttons for quick operation, plug-and-play design makes it easy to use, you can easily operate it without reading the manual. The OBD2 scanner is not only designed to be lightweight and portable, but also simple, accurate and fast to operate, affordable and more cost-effective, it is a must-have tool for home DIY diagnosis or mechanics to use in auto repair.
Battery Tester and Advanced OBDII System Diagnostics: This advanced code reader with battery has a built-in easy-to-use battery tester for monitoring battery life and voltage, helping you quickly assess the battery health of your vehicle, prevent unexpected failures and ensure reliable car performance. At the same time, this engine fault code reader provides advanced diagnostic functions, including testing the O2 sensor and EVAP system to measure oxygen concentration, control the amount of fuel injection, reduce fuel consumption, maintain optimal combustion conditions, improve engine efficiency; reduce exhaust emissions, and better protect the environment.

Rank No. #3

FOXWELL NT301 OBD2 Scanner Live Data Professional Mechanic OBDII Diagnostic Code Reader Tool for Check Engine Light

[Vehicle CEL Doctor] The NT301 obd2 scanner enables you to read DTCs, access to I/M readiness status, figure out the root reason of check engine light or MIL turned on, monitor sensors test, read live data and retrieve VIN of your vehicle. The fault code only can be cleared after repair finished by NT301, as like all the obd2 code readers' working principle
[Accuracy & Streams] Live data graphing and logging. Accurately read error codes for most Worldwide cars, SUVs, light trucks and 12V diesels equipped with Obd2. Graphing live vehicle sensors data allows you to focus on any suspicious data and trend.
[Worthy to Own] Recommended by most professional mechanics on Youtube. Codes analysis and Printer compatible. Unique PATENTED design, 2.8" color screen and 1-year seller assurance with EXCLUSIVE tech and service team. Plug & Play, no need to update before using. Available to windows system. NOT support ios and Mac
[S-mog Check Helper] Read/Erase and I/M readiness hotkeys make it easy to use the car computer reader right out of the package. Red-Yellow-Green Leds and build-in speaker indicate the readiness status for confident e-missions test
[Home Necessity] Open to global customers. No battery required, NT301 obd scanner is charged directly from the 16pin DLC in your vehicle. It is recommended as a necessity in your toolbox and great choice for Home and Autoshop Mechanics. This scanner for car only supports to read the fault code of engine system, not support ABS or SRS

SaleRank No. #4

MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

Multi-Functions - It's a practical multi-function OBD2 code reader which helps you determine the cause of the check engine light coming on, quickly read and remove diagnostic trouble codes, read live data & hard memory data, view freeze frame, I/M monitor readiness and collect vehicle information. Instead of taking car to mechanic shop, you can use it to check the trouble code and show code definition by yourself. Wide Compatibility - Supports 9 protocols compatible with most 1996 US-Based, 2000 EU-Based and Asian cars, light trucks, SUVs, as well as newer OBD2 and CAN vehicles both domestic and foreign. Check compatibility with your vehicle model before purchasing. It can also be used for some motorcycle OBD2 system diagnosis. (Note: an additional specific adapter cable is needed. not included with this device) 2.8" LCD Display & Multi-language - Designed with a clear 2.8" LCD screen (128 x 64 pixels) - white backlight and contrast adjustment. No need any battery or charger, OBD reader gets the power directly from your vehicle through the OBDII Data Link Connector. It also supports 6 languages - English,German, Dutch, Spanish, French and Italian. This scanner is enjoyed and highly recommended by the customers worldwide. Compact Design & Easy to Use - It weighs about 12 ounces and measures 6 x 2.75 x 0.9 inches. Equiped with a 2.5 feet long heavy duty cable and the standard 16-PIN OBD connector. 6 buttons for quick operation. The plug and play design makes it user-friendly. Even if you don't have much technical knowledge, you can operate it without any hassle. "Accurate & Fast - Different with other similar scanners, the MP69033 scanner use the brand new ARM micro processor to make sure the ultra high accuracy and fast speed. With the excellent performance of the micro processor, the detailed real-time engine data can be detected and displayed on the screen in seconds. Get codes, fix the problem and turn off the CEL. If you just need a code reader to check your car, it's definitely an affordable and reliable tool.

SaleRank No. #5

FOXWELL NT201 OBD2 Scanner Code Reader for Cars and Trucks Check Engine Light, Read and Clear Fault Codes, Live Data Diagnostic Tool for All Cars After 1996

Read and Clear Fault Codes: FOXWELL NT201 code reader for cars and trucks could quickly detects the issue that triggers the check engine light, reads and clears engine fault codes, and turns off the check engine light (MIL) after repairs.
Live Data and DTC Reference: Access live data like ETC, MAP, and RPM to identify engine issues accurately. Equipped with built-in trouble code library to provide instant code definitions and clues for your reference to begin car troubleshooting in the right direction and fix car effectively.
One Key Emissions Test: Easily check your vehicle's emission readiness status with one-click I/M readiness hotkey. The car code reader provides visual(red/yellow/green lights) to guide you through the process, simplified emissions checks before state inspections.
Extensive OBDII Modes: Features advanced OBDII functions, including O2 Sensor Test Mode 5 for CAN protocol vehicles. This NT201 obd2 scanner helps diagnose engine performance by analyzing oxygen content in exhaust gases, which is important for addressing engine efficiency issues.
Broad Compatibility: Works with all OBDII/EOBD compliant cars, light duty trucks, suv, minivans, and hybrids sold worldwide. NT201 engine light code reader supports all cars after 1996. Contact us to confirm compatibility with your vehicle if unsure.

Rank No. #6

Autel OBD2 Scanner MS309 Universal Car Engine Fault Code Reader, Check Engine Light and Emission Monitor Status, OBDII CAN Diagnostic Scan Tool

🔥【On-Screen DTC Definition, Save Time & Easy To Use】Autel MS309 OBD2 code reader with UPGRADED CHIP to retrive and clear generic(P0, P2, P3 and U0), manufacturer-specific(P1, P3 and U1) and pending codes, and display DTCs(Diagnostic Trouble Codes) meanings under the codes based on the built-in database(more than 3000 codes). Don't need to spend much time to search meanings on the internet. This advanced plug-and-play MS309 scanner saves you time - a must-have obd2 scanner for each car owner.
🔥【Retrieve Freeze Frame Data &Vehicle info】The more specific the information available, the clearer the problem. The OBD2 scanner MS309 can retrieve freeze frame data, including important engine parameters like RPM, fuel pressure, fuel trim, engine coolant temperature, etc. Also it can retrieve Vehicle Information such as VIN number, Calibration ID(s), Calibration Verification Nos. (CVNs), etc, which is useful to check whether the ECU matches when you are buying a used car.
🔥【Read Codes & Clear Codes】Knowing the codes in advance will brace you for the repair cost estimate so that you won't be fooled and get overcharged by the repair shop.This Autel MaxiScan MS309 obd2 scanner scans OBD2-compliant vehicle Diagnostic Trouble Codes (DTCs) in seconds to pinpoint emission-related issues. The little guy can do many basic but necessary works: read/clear codes, view DTC definition, turn off check engine light, check I/M Readiness status, retrieve freeze frame data and vehicle info.
🔥【Turn Off Check Engine Light】When your car detects an emission related problem, Check Engine Light will be turned on. Do you want to spend hundreds of dollars to turn off this light every time, maybe it's just a gas cap that's not tightened or needs to change bad parts like spark plugs and ignition coils? With Autel MS309 scan tool, you can read code to quickly find out why the check engine light is on and reset it.
🔥【Ready For Annual Smog Check】If the OBD II Readiness Monitors on your car are not “Ready”, your car may fail the smog check. MS309 OBD2 scanner can retrieve I/M Readiness status to check the monitors like misfire monitor, fuel system monitor, comprehensive components monitor, catalyst monitor, O2 sensors, EVAP, etc, to help your car ready pass the annual smog check. That way you won't waste time and money on a failed smoke check.

Rank No. #7

VDIAGTOOL VD10 OBD2 Scanner Code Reader Car Diagnostic Tool Engine Fault Code Reader for Turn Off CEL with Live Data/Freeze Frame/I/M Readiness for All OBDII Protocol Cars, 2025 New Version

【A MUST-HAVE TOOL FOR DIYERS】- VDIAGTOOL VD10 car code reader is an incredibly useful obd scanner for each car owner or hobbyist, even for those with little to no experience when it comes to vehicle mechanics! Using this car diagnostic scanner is extremely easy. All you have to do is attach it to your car OBDII port and you can diagnose car problems in seconds! Read Codes (DTCs); Clear Codes; Live Data; View Freeze Frame; I/M Readiness; Vehicle Information.
【KEEP ENGINE IN GOOD STATUS】- VDIAGTOOL check engine code reader brings a fast access to scan, read the car fault code, show its definition on the screen instantly, troubleshooting to find the root causes of problems, erase the engine fault code and turn off the MIL (Malfunction Indicator Light).car code reader
【READ/CLEAR CODES & DTC LOOKUP】- No search online & saving your time, this vehicle car code reader retrieves generic (P0, P2, P3, and U0), manufacturer specific (P1, P3, and U1) codes, pending codes and displays DTC definitions based on the built-in database(more than 3000 codes) on the TFT screen, find out the root causes and clear the codes after fixed.
【LIVE DATA & RETRIEVE FREEZE FRAME】- This diagnostic scan tool for accurate diagnosis enables you to retrieve data from vehicle sensors, such as Engine RPM, Intake air temperature, Short/Long term fuel, Misfire data and etc. The freeze frame is stored in the PCM together with the diagnostic trouble code (DTC) related to the fault. VD10 car code reader car scanner can be a valuable & practical diagnostic aid and also greatly help when diagnosing intermittent problems.
【I/M READINESS for THE S-nn-0-g CHECK】- OBDII vehicle may not pass the annual inspection unless the required monitors since reset are complete. So you should at least read the readiness monitors and make sure they are ready. This car obd2 scanner diagnostic tool is equipped with I/M readiness function to check the operations of the e-m-issi0n system on OBD2 compliant vehicles, run I/M monitor readiness test, checking if the pass vehicle s-m-0-g inspection.

SaleRank No. #8

AMTIFO OBD2 Scanner with Battery Tester - Diagnostic Tool for Cars, Check Engine Light & Emissions Readiness, Real-Time Date, Plug & Play, Multilingual, Support All Vehicles

Comprehensive Vehicle Diagnostics – Supports nine OBDII/EOOBD protocols, providing complete diagnostics for all car types. Easily read and clear check engine light codes for accurate troubleshooting
Battery Health & Voltage Monitoring – Exclusive battery tester checks battery life, charge, and voltage, keeping you informed of your car's battery status at all times
Real-Time Data Streaming – Access live data with clear graphs, enabling you to monitor vehicle performance in real-time and ensure emissions readiness for smog checks
User-Friendly & Multilingual – Simple plug-and-play setup with a responsive color screen. Supports 13 languages, making diagnostics accessible to users worldwide.
Durable & Compact Design – Built to last with a rugged exterior for easy handling. Portable and convenient, ideal for DIY diagnostics at home or professional use in shops.

SaleRank No. #9

ANCEL AD410 Enhanced OBD2 Scanner, Vehicle Code Reader for Check Engine Light, Automotive OBD II Scanner Fault Diagnosis, OBDII Scan Tool for All OBDII Cars 1996+, Black/Yellow

WIDE COMPATIBILITY – Trusted by YouTube Star Scotty Kilmer. The AD410 OBD2 Scanner supports all 16PIN vehicles that comply with the OBDII protocol, including KWP2000, ISO9141, J1850 VPW, J1850 PWM, and CAN. This OBD2 code scanner compatible with 1996 US-based, 2000 EU-based and Asian cars, light trucks, SUVs, as well as newer OBD2 and CAN vehicles. Multilingual support (English, German, French, Spanish, etc.), this car code reader is ideal for international users. Check compatibility with your vehicle model before purchasing. !!! Powered directly from your vehicle's OBDII connector, this diagnostic tool doesn' t need a battery or charger.
CRITICAL FUNCTIONALITY – Quickly Read & Clear Fault Codes. The AD410 obd2 scanner diagnostic tool quickly reads and clears stored emissions-related codes, pending codes, and provides code definitions. With over 42,000 built-in DTC lookups, you can easily identify faults without the need for Google searches. Reset the MIL, check monitor readiness before smog tests, and understand your vehicle's health before costly repairs. !!! Note: Fault codes can be cleared after resolving the underlying issue, the code reader itself does not have a reset function.
ENHANCED OBDII DIAGNOSTICS – Comprehensive System Testing. This engine obd2 scanner diagnostic tool offers advanced diagnostics, including testing of O2 sensors and EVAP systems. Perform a leak test on your vehicle's EVAP system and monitor the fuel tank's integrity. The O2 sensor test helps fine-tune the air/fuel mixture, improving fuel efficiency and reducing emissions—saving you money at the pump and reducing your car's environmental impact. !!! Note: The AD410 is only an engine code reader, it DOESN'T support other systems such as ABS, SRS, Transmission and others.
QVGA DISPLAY & NEW UI – Easy-to-Use, User-Friendly Interface. The AD410 scanner for car boasts a 2.4 TFT true-color LCD display (262K) for clear, easy-to-read results. With an intuitive UI design, you can quickly access OBDII diagnostics, I/M readiness checks, DTC search, and setup options. No need to read a manual—this user-friendly auto diagnostic code scanner is perfect for beginners, mechanic and seasoned users alike.
DIAGNOSTIC REPORTS & FREE LIFETIME UPDATES. The AD410 car scanner reader allows you to review, save, or print detailed diagnostic trouble code reports. Plus, with lifetime free software updates, you’ll always have the latest features and bug fixes. Simply download the updates from the ANCEL website and follow the easy on-screen installation instructions. (Note: update is not necessary, the AD410 code reader can be directly inserted into the OBDII interface of the car to use, if it doesn't work, then consider updating the device.) The ANCEL website provides the latest product user manual, which can be downloaded and viewed at any time.

SaleRank No. #10

OBD2 Scanner, CGSULIT SC103 Car Code Reader Diagnose Check Engine Light Smog Check DTCs Scan Tool Live Data Stream Voltage Test for Vehicles Since 1996

Your Trusted Check Engine Light Specialist - CGSULIT is a professional automotive diagnostic tool manufacturer recommended by well-known YouTuber and auto mechanic Scotty Kilmer. The lasted SC103 check engine code reader delivers exceptional value, allowing you to effortlessly read and clear diagnostic codes, check I/M readiness status, and swiftly turn o-f-f the Check Engine Light or Malfunction Indicator Lamp. With the ability to read voltage, view live data streams, and retrieve key vehicle information, the SC103 scanner for cars puts control back in your hands without the need for costly trips to the auto shop.
Advanced Compatibility and Protocols - Engineered to support a wide range of vehicles, the SC103 code readers & scan tools are compatible with all OBDII protocols, including KWP2000, J1850 VPW, ISO9141, J1850 PWM, and CAN. It works seamlessly with US-based vehicles from 1996, EU-based vehicles from 2003, and Asian-based vehicles from 2008, covering 12v light trucks and SUVs. Please note, new energy vehicles without traditional combustion engines are not supported.
Precision Design for Easy Use - Unlike other obsolescence and unclear displayed obd2 scanners, this car diagnostic tool, equipped with a vibrant 2.8-inch TFT color screen and an industrial-grade chip, ensures rapid and accurate performance. Its compact and portable design makes it perfect for professional auto shops and DIY enthusiasts alike. Simply plug in and play—no batteries required. Experience hassle-free diagnostics anytime, anywhere.
Text & Graphical Data Display - Experience real-time vehicle sensor data in both text and graphical format for enhanced visibility and monitoring. Track crucial metrics like car speed, load values, engine coolant temperature, and RPM at a glance. Explore your vehicle's status by comparing freeze frame data with real-time readings for a comprehensive analysis.
I/M Readiness and DTC Lookup - Stay ahead of mandatory testing with our I/M monitor readiness feature, offering precise data retrieval to evaluate your vehicle's preparedness. Built-in the comprehensive DTC library included with the scanner to guide your repair efforts effectively.

Last update on 2025-03-31 / Affiliate links / Images from Amazon Product Advertising API

How Do You Buy The Best check engine light tester?

Do you get stressed out thinking about shopping for a great check engine light tester? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching check engine light tester, which is why we have assembled a comprehensive list of the greatest check engine light tester available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for check engine light tester that you consider buying. Your questions might include the following:

Is it worth buying an check engine light tester?
What benefits are there with buying an check engine light tester?
What factors deserve consideration when shopping for an effective check engine light tester?
Why is it crucial to invest in any check engine light tester, much less the best one?
Which check engine light tester are good in the current market?
Where can you find information like this about check engine light tester?

We’re convinced that you likely have far more questions than just these regarding check engine light tester, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for check engine light tester, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible check engine light tester. Make sure that you are only using trustworthy and credible websites and sources.

We provide an check engine light tester buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available check engine light tester currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

Brand Value: Every brand of check engine light tester has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an check engine light tester?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your check engine light tester.
Customer Ratings: Number ratings grade check engine light tester objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their check engine light tester.
Product Quality: You don’t always get what you pay for with an check engine light tester, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an check engine light tester is should be an indication of how long it will work out for you.

We always remember that maintaining check engine light tester information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

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The Best check engine light tester of 2022 – Reviewed and Top Rated

How Do You Buy The Best check engine light tester?

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