Top 10 Picks
Konnwei Code Readers
Updated December 6, 2022
1
KONNWEI KW850 Professional OBD2 Scanner Auto Code Reader Diagnostic Check Engine Light Scan Tool for OBD II Cars After 1996(Original)
Warranty3 Years Manufacture
★【SAVES MONEY AND TIME】The KW850 car computer reader is a professional vehicle diagnostic tool for car owners to quickly read and erase DTC (engine fault codes) as well as a battery tester. A look-up library with over 8, 000 built-in generic code definitions allows you to accurately identify the cause of your CHECK ENGINE and perhaps fix it without going to see your dealer. It also assists you in easily passing annual emissions tests and SMOG CHECK.
★【NOT ONLY TURN OFF THE CHECK ENGINE LIGHT 】Unlike other cheap car diagnostic scanners, KW850 OBDII code reader covers full OBDII/ EOBD diagnostic functions for engine system. O2 sensor test, EVAP systems test, and on-board monitoring test give you full control of your vehicle's running status, while a graphical and numeric live data stream display will help you to find out the faulty sensor readings. (Please be noticed: this function is for ENGINE System only).
★【UNIVERSAL COMPATIBILITY AND EASY TO USE 】Works on most 1996 US-based, 2003 EU-Based and Asian (OBDII & CAN) domestic and imported vehicles, including passenger cars, SUVs, light trucks, etc. Supports all OBDII protocols. Simply plug into the OBD II port on your car, turn the ignition on and you are ready to go. No battery or complicated apps install needed.
★【BEST IN THE MARKET】KW850 code reader car diagnostic tool is coming with the user friendly diagnostic interface and optimized software algorithm, it makes diagnosis 2-3 times faster than other OBD2 scanners. Featuring 2. 8'' LCD color screen and graphical real time sensor analysis, may help you fast identify faulty readings in seconds. Extra-long (4. 5') diagnostic cable coming in the package, allows you freely diagnose your cars even outside of vehicles.
Weight
1 lbs
Color
OBD2 Scanner Auto Code Reader Car Diagnostic Tool
9.9
JunkieScore
22% OFF
2
OBD2 Scanner OBDII Auto Diagnostic Code Scanner Universal Vehicle Engine O2 Sensor Systems OBD2 EOBD Scanners Tool Check Engine Light Automotive Code Reader for all OBD II Protocol Car Since 1996
Warranty1 Year
➤➤➤➤➤【POWERFUL FEATURES】-The KONNWEI OBD2 automotive code reader is a professional diagnostic scan tool for car owners, which has Almost OBDII/EOBD Diagnostic Functions, including Read & Clear DTCs, Query Freeze Frame Data, Read Dynamic Datastream, Read Vehicle Information, O2 Sensor Test, EVAP Systems Test, On-board Monitor Test, Read Pending Fault Code, Read Permanent DTC, Read Readiness Status, Turn-off Malfunction Indicator Light (MIL), Print Data to PC, Permanent Code Retrieval, and more.
➤➤➤➤➤【POWERFUL COMPATIBILITY】- The KONNWEI obd2 code scanner works on most vehicles sold in the USA from the year of 1996; Supports all OBDII protocols: KWP2000, ISO9141, J1850 VPW, J1850 PWM and CAN. Works with English, German, French, Spanish, Italians, Dutch, Russian and Portuguese. It gets the power directly from the OBDII Data Link Connector in your vehicle. Fast scan and erase engine fault codes, let you decide if it's something you can fix or need more advanced help. Save money and time.
➤➤➤➤➤【EXCLUSIVE OBDII DIAGNOSTICS】- This obd ii car scanner automotive scanner with unique one-click I/M readiness status design, which fast to scan vehicle’s engine healthy status. Exclusive O2 Sensor Test, EVAP Test of Fuel Tank System(Mode 8) and Advanced On-board Monitoring(Mode 6) make you full control of vehicle running status. Red-Yellow-Green LED indicators allow you easily determine whether your vehicle meets the State Emission Monitor Status and assist you to pass the Smog Check.
➤➤➤➤➤【SMART DESIGN】- KONNWEI OBDII diagnostic scanner has 2.8" Big Size LCD Color Screen. No need to install any APP, you can read codes on the screen. Anti-shock and slip designed, unique dust-resistant surface, give you more comfortable hand feeling, more durable and stronger. Audio feedback and 3 LED indicators tell you the trouble codes status and allow you to diagnose vehicles faster and more convenient to operate.
Weight
1 lbs
Color
OBDII Auto Diagnostic Code Scanner
9.8
JunkieScore
11% OFF
3
KONNWEI KW681 OBD2 Scanner 6V 12V Car Battery Tester, 2 in 1 Car Diagnostic Scanner Automotive Battery Alternator Load Tester Check Engine Code Reader Scan Tool
【ENHANCED OBD2 SCANNER & BATTERY TESTER】KONNWEI KW681 is the perfect combination of check engine code reader and 6V&12V car battery alternator load tester. Not only can this obd2 scanner read live O2 sensor test data, freeze frame data, on-board monitor test data, turn off check Engine Light (MIL), clear codes and resets monitor, retrieve vehicle information(VIN, CID and CVN). Also it can provide overall analysis of batteries’ health and help you know its status in advance before it dies.
【AUTOMOTIVE CAR BATTERY TESTER】KW681 can test all 6V & 12V 100-2000CCA batteries including regular flooded, AGM flat plate, AGM spiral, or gel batteries. Provide overall analysis of batteries’ health and help you know its status in advance before it dies. KW681 battery tester support cranking and charging system test also alternator and starter test.
【DISPLAY LIVE DATA OR VOLTAGE IN GRAPHING】KW681 obd2 scanner automotive diagnostic tools shows live vehicle sensors data including real-time voltage change in test and graph formats, allows you to focus on any suspicious or symptom-specific data parameters and playback real PID data from the electronic control module. Accurately read error codes for most Worldwide cars, SUVs, light trucks and 12V diesels, it’s a obd2 car diagnostic scanner for all cars.
【ONE-KEY I/M REDINESS/WAVEFORM】Large TFT color screen and hot keys for I/M readiness access to emission status and battery waveform with one click. Red-Yellow-Green indicator helps to display car status directly. KW681 car computer code reader Work on most 1996 and newer domestic and import gasoline or diesel vehicles(OBDII & CAN) that are located in USA, including passenger cars, SUVs, light trucks, etc.
Color
KW-681
9.6
JunkieScore
27% OFF
4
KONNWEI KW860 OBD2 Scanner Car Code Reader Diagnostic Scan Tool with Enhanced Live Data Stream and Upgraded Graphing Battery Status Check Function
🚗 Works on most vehicles ➤ 1996 US-based, 2003 EU-Based and Asian (OBDII & CAN) domestic and imported vehicles, including passenger cars, SUVs, light trucks, etc. Supports all OBDII protocols. Simply plug into the OBD II port on your car, turn the ignition on and you are ready to go. No battery or complicated apps install needed.
🚗 Full 10 OBD2 service modes ➤ Turn off malfunction indicator light (MIL), read/erase fault codes and reset the monitor, graphing live data stream, view freeze frame data, O2 sensor test, EVAP system test, I/M readiness status (emissions), advanced On-Board monitoring test and retrieves vehicle information (VIN).
🚗 Enhanced battery check function ➤ allows monitoring your vehicle battery status automatically with real-time graph data which will ensure you access and analyze the accurate live data and determine the battery's health status or estimate remaining life. Know your car battery conditions in advance.
🚗 Fault code definition & Repair suggestion➤ helps you fully understand the meaning of the engine fault codes. Pressing the "i" button will give you accurate repair advice instead of a bunch of technical terms you don't understand. It saves you the trips to a mechanic and helps you decide whether fix it by yourself or go to a repair store, save money and time.
Color
KW860
9.3
JunkieScore
5
OBD2 Scanner Professional KONNWEI KW850 OBD II Automotive Scanner Code Reader Car Diagnostic Scan Tools Check Engine Light Tool for All OBDII Protocol Car After 1996 (Updated Version)
【OBD2 Functions】--OBD2 Scanner Can Quickly Read And Erase DTC (engine fault codes), on-screen DTC definitions and built-in DTC look up library allow you accurately determine causes of the check engine light tool and turn-off Check Engine Light, Reset Monitors; I/M Readiness Monitoring; Graphical and Numeric Live Data Stream; Automatic VIN acquisition, etc.
【Strong Compatibility】--The OBD2 Works on All 1996 and newer gasoline vehicles (OBDII& CAN)-Domestic and import; Auto scanner Supports all OBDII protocols: KWP2000, ISO9141, J1850 VPW, J1850 PWM and support XP WIN7 WIN8 WIN10 system. Exclusive O2 Sensor Test, EVAP Test of Fuel Tank System and On-board Monitoring Make You Full Control of Vehicle Running Status. Fully Supports Record and Review Data Stream, DTCs, Freeze Frame, and Prints Out the Reports Via USB.)
【Smart Diagnostics】--The Diagnostic Scanner Code Reader Can fast to scan vehicle’s engine healthy status. Exclusive O2 Sensor Test, EVAP Test of Fuel Tank System(Mode 8) and Advanced On-board Monitoring(Mode 6) make you full control of vehicle running status. check engine code reader, Audio Feedback and 3 LED Indicators Tells You the Trouble Codes Status and Allows You to Diagnose Vehicles Faster and More Convenient to Operate.
【Rugged Patented Design】--2.8" TFT Big LCD Color Screen OBDII Diagnostic Scan Tool. Do not need to install APP, you can read codes on the screen. Anti-shock and slip designed, unique dust-resistant surface, give you more comfortable hand feeling, more durable and stronger. Audio feedback and 3 LED indicators tell you the trouble codes status ,Exclusive 5-ft Long Diagnostic Cable Allows You to Perform a Professional OBDii Readers Engine Diagnostics In or Out of Your Vehicles.
Weight
1 lbs
Color
Black/Red
9.3
JunkieScore
6
KONNWEI KW350 Full System OBD2 Diagnostic Scanner for VW Audi Skoda Seat Code Reader Automotive Check Engine Light EPB ABS SRS OBDII Scan Tool Oil Throttle Position Adaption Brake Pad Reset Tool
➤Exclusive Full-system Diagnostic Scanner: KW350 vag scan tool is the unique version for V/A series vehicles that supports full system diagnosis including car engine light, ABS, Transmission, SAS, ESP, TPMS and other systems. Also equipped with particular functions like reset the oil, brake pad and throttle position adaption and so on for V/A series vehicles.
➤Widely Compatible: KW350 OBD2 scanner is specially designed for diagnosing most 12V 16-Pin OBD Volkswagen/Audi/Skoda/SEAT V/A Series vehicles, also can work on other 1996 or newer normal cars and light trucks (non-electric) which have 16-Pin OBDII interface, car diagnostic scanner supported OBD2 protocols contains J1850 VPM, J1850PWM, ISO9141, KWP 2000 and CAN.
➤Professional Car OBD Scanner: KW350 OBDII code reader covers full OBDII/ EOBD diagnostic functions for the car engine system. Except for the basic function for car owners to quickly read and erase DTC (engine fault codes), this auto codes scanner also support O2 sensor test, EVAP systems test, live data and on-board monitoring test, I/M readiness, etc. Use diagnostic tool gives you full control of your vehicle's running status.
➤Excellent Hardware: KW350 car diagnostic tool has a 2.4" TFT LCD display screen to indicates the testing data, easy to read. With the silicone keypad you can quickly aware of how easy it is to operate the scanner and access these menu options. Rugged anti-drop case prevents falling, plus obd2 extension cable is more convenient for you to use this automotive code scanner.
Weight
460 Grams
Color
KW350
9.1
JunkieScore
7
KW850 OBD2 Scanner + KW310 OBD2 Scanner
【SAVES MONEY AND TIME】The KW850 car computer reader is a professional vehicle diagnostic tool for car owners to quickly read and erase DTC (engine fault codes) as well as a battery tester. A look-up library with over 8, 000 built-in generic code definitions allows you to accurately identify the cause of your CHECK ENGINE and perhaps fix it without going to see your dealer. It also assists you in easily passing annual emissions tests and SMOG CHECK.
【NOT ONLY TURN OFF THE CHECK ENGINE LIGHT 】Unlike other cheap car diagnostic scanners, KW850 OBDII code reader covers full OBDII/ EOBD diagnostic functions for engine system. O2 sensor test, EVAP systems test, and on-board monitoring test give you full control of your vehicle's running status, while a graphical and numeric live data stream display will help you to find out the faulty sensor readings. (Please be noticed: this function is for ENGINE System only).
【FULL OBD2 MODES ENGINE CODE READER】KONNWEI KW310 OBDII code reader is a professional car computer fault code reader, except the normal read/erase engine fault codes function, it still supports Live data, Freeze Frame, I/M Readiness, O 2 test, On-board Monitoring that other obd2 scanners don’t have at this price.
【WORK ON ALL USA 1996 AND NEWER VEHICLES】Work on most 1996 and newer domestic and import gasoline or diesel vehicles(OBDII & CAN) that are located in USA, including passenger cars, SUVs, light trucks, etc. Simply connect the car computer reader with car’s obd2 port, turn on ignition then it’s ready to analyze check engine light. No battery or apps needed.
9.0
JunkieScore
33% OFF
9
2Packs KONNWEI KW850 Professional OBD2 Scanner Auto Code Reader (Red + Black)
★【SAVES MONEY AND TIME】The KW850 car computer reader is a professional vehicle diagnostic tool for car owners to quickly read and erase DTC (engine fault codes) as well as a battery tester. A look-up library with over 8, 000 built-in generic code definitions allows you to accurately identify the cause of your CHECK ENGINE and perhaps fix it without going to see your dealer. It also assists you in easily passing annual emissions tests and SMOG CHECK.
★【NOT ONLY TURN OFF THE CHECK ENGINE LIGHT 】Unlike other cheap car diagnostic scanners, KW850 OBDII code reader covers full OBDII/ EOBD diagnostic functions for engine system. O2 sensor test, EVAP systems test, and on-board monitoring test give you full control of your vehicle's running status, while a graphical and numeric live data stream display will help you to find out the faulty sensor readings. (Please be noticed: this function is for ENGINE System only).
★【UNIVERSAL COMPATIBILITY AND EASY TO USE 】Works on most 1996 US-based, 2003 EU-Based and Asian (OBDII & CAN) domestic and imported vehicles, including passenger cars, SUVs, light trucks, etc. Supports all OBDII protocols. Simply plug into the OBD II port on your car, turn the ignition on and you are ready to go. No battery or complicated apps install needed.
★【BEST IN THE MARKET】KW850 code reader car diagnostic tool is coming with the user friendly diagnostic interface and optimized software algorithm, it makes diagnosis 2-3 times faster than other OBD2 scanners. Featuring 2. 8'' LCD color screen and graphical real time sensor analysis, may help you fast identify faulty readings in seconds. Extra-long (4. 5') diagnostic cable coming in the package, allows you freely diagnose your cars even outside of vehicles.
8.7
JunkieScore
29% OFF
Our #1 Pick in Konnwei Code Readers

1
KONNWEI KW850 Professional OBD2 Scanner Auto Code Reader Diagnostic Check Engine Light Scan Tool for OBD II Cars After 1996(Original)
Warranty3 Years Manufacture
★【SAVES MONEY AND TIME】The KW850 car computer reader is a professional vehicle diagnostic tool for car owners to quickly read and erase DTC (engine fault codes) as well as a battery tester. A look-up library with over 8, 000 built-in generic code definitions allows you to accurately identify the cause of your CHECK ENGINE and perhaps fix it without going to see your dealer. It also assists you in easily passing annual emissions tests and SMOG CHECK.
★【NOT ONLY TURN OFF THE CHECK ENGINE LIGHT 】Unlike other cheap car diagnostic scanners, KW850 OBDII code reader covers full OBDII/ EOBD diagnostic functions for engine system. O2 sensor test, EVAP systems test, and on-board monitoring test give you full control of your vehicle's running status, while a graphical and numeric live data stream display will help you to find out the faulty sensor readings. (Please be noticed: this function is for ENGINE System only).
★【UNIVERSAL COMPATIBILITY AND EASY TO USE 】Works on most 1996 US-based, 2003 EU-Based and Asian (OBDII & CAN) domestic and imported vehicles, including passenger cars, SUVs, light trucks, etc. Supports all OBDII protocols. Simply plug into the OBD II port on your car, turn the ignition on and you are ready to go. No battery or complicated apps install needed.
★【BEST IN THE MARKET】KW850 code reader car diagnostic tool is coming with the user friendly diagnostic interface and optimized software algorithm, it makes diagnosis 2-3 times faster than other OBD2 scanners. Featuring 2. 8'' LCD color screen and graphical real time sensor analysis, may help you fast identify faulty readings in seconds. Extra-long (4. 5') diagnostic cable coming in the package, allows you freely diagnose your cars even outside of vehicles.
Weight
1 lbs
Color
OBD2 Scanner Auto Code Reader Car Diagnostic Tool
9.9
JunkieScore
22% OFF

Simple OBD2 Scanner Buying Guide

Author Ann M
Published on October 19, 2022
by Ann M

This guide will cover Onboard Diagnostic Scanners (OBD2) and why this affordable and invaluable tool should be as ubiquitous as a spare tire for nearly all vehicle owners. Every domestic or imported vehicle manufactured since 1996 is mandated to be equipped with a data port located near the driver’s seat. In the years prior to 1996, domestically sold vehicles weren’t required to feature these data ports. If you own a Ford, GM, Chrysler, or Toyota from the 1980s-1995, there is a scanner that is adaptable to OBD1 technology. More on that later.

Most drivers, when the inevitable check engine or oil change light pops-up, will race towards the nearest mechanic shop or dealer service center and begrudgingly shell-out $249 for a vehicle diagnostic check.

The price of OBD scanners has dropped precipitously in recent years, which means that they are no longer cost-prohibitive. Even if you are a neophyte to car repairs, you can’t afford to not feature one of these devices in your arsenal. It should be noted that major auto parts retailers will OBD scan your vehicle and provide you with codes free of charge, or let you borrow their scanner.

Next, I will outline the benefits of owning an OBD scanner, even if you aren’t mechanically inclined.

Benefits of Owning an OBD2 Scanner

- At a typical cost starting at $30, these devices are affordable, and will pay for themselves if they save you even one trip to the shop.
- Erase error codes and turn off oil change lights in your driveway.
- In-depth diagnostic information of all major systems of your vehicle, including predictive repairs.
- Spot-check the integrity and honesty of your mechanic.
- Avoid costly, unnecessary repairs.
- Diagnose and repair basic issues yourself without the need for expensive technicians.

Like most consumer electronics, selecting the right make and model can be a daunting task. In the next section, I will cover the basic differences between the types of OBD scanners and the features you should focus on.

Types & Features of OBD2 Scanners

Entry-level, or handheld scanners are hardwired, which means that you attach a cable adapter to the data port in your vehicle which transmits a wired signal to the device. The information they provide is basic, like typical error codes. You will be relegated to cross-referencing these codes to Google. Their scope is more narrow than the more expensive OBDs. Most of the entry-level models will not facilitate the removal of error lights, and provide only the most basic of diagnostic information.

Inexpensive OBDs are simply code readers, and more elaborate ones are scan tools. For the typical car owner seeking to audit their mechanic or assess and address a basic issue, a code reader is likely adequate. For more advanced diagnostics and car repairs, a scan tool is probably the answer. All scan tools are code readers, but not all code readers are scan tools.

Also available at the entry price level are dongle-style tools that plug into your data port and transmit all pertinent vehicle data to a number of different apps. They do not have wires, a keyboard, or a screen like handheld units.

At the top of the price range are the wireless OBDs, which transmit their data on-screen or via Bluetooth or Wi-Fi to a customized app. These devices provide the most in-depth diagnostics, parts recommendations, service updates (like recalls), thorough vehicular systems evaluations, and repair instructions. They will also turn your check engine or oil change light off. They can even evaluate the health of your battery, and offer predictive information if a system is bound for maintenance or repair. They have the traditional keyboard and screen, but also work through diagnostic apps.

It’s important to cross-reference your vehicle with the model of scanner you are considering purchasing. Not all devices work with every make and model of cars.

If you are simply wanting to diagnose your check engine light, the less-expensive code readers will suffice. If you plan on tackling a portion of your ongoing maintenance and repairs and are fairly mechanically-adept, spring for one of the more elaborate scanning models.

The differences in scanners can be subtle, so scour the reviews to make an informed buying decision. In the next section, I’ll provide you with a few of the top-rated devices, their prices, and key features.

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