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KONNWEI KW850 Review: A Reliable Multifunctional OBD2 Scanner

In this review, I will write about KONNWEI KW850, one of the best OBD2 Scanners in the market in 2020

Let’s start NOW with the comparison between Konnwei KW850 and its competitors!

KONNWEI KW850 Vs. Foxwell NT301 Vs. FIXD Comparison Chart

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foxwell nt301
Foxwell NT301
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fixd car health monitor
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Customer Rating
4.64.6 / 5
4.54.5 / 5
4.14.1 / 5
PriceKONNWEI KW850 pricefoxwell nt301 pricefixd car health monitor price
Product Dimensions9.5" x 3.9" x 2"8.7" x 3.1" x 6.7"1.5" x 0.5" x 1.8"
Item Weight1lbs1.2lbs0.96oz
Reset MIL
Engine Diagnostics
Live Data/Freeze Frame
Check I/M readiness status
Full OBD2 Service Functions
Car, SUV, Light Truck, DieselCar Only
Car Health Monitor----

Bonus: Should you need something different, read the Review & Comparison of the 3 Best OBD2 Scanners 2020 HERE

KONNWEI KW850 checks O2 sensor systems and reads OBD for American vehicles vehicle’s built since 1996.
KONNWEI KW850 is one of the best OBD2 scanner in market.

Overview Of KONNWEI KW850

Today, there’s a plethora of OBD2 sensor systems to pick from. What sets them apart is the functions and tasks they can perform. These gadgets are quite useful for diagnosing issues on modern cars, and the same with Konnwei OBD2 KW850.

Konnwei OBD2 KW850 Scan Tool was developed to help car owners diagnose their vehicle’s computer.

You can simply connect it to your car’s diagnostic port, start the engine, and scan for trouble codes. It can read its diagnostic data from this Konnwei hand-held device.

Finding the cause of the check engine light warnings or trouble codes has become much easier.

This tool works on any car, light truck, hybrid, SUV, or hybrid manufactured from 1996. You also don’t have to be worried while working with this diagnostic tool.

Detailed Review Of KONNWEI KW850

Konnwei OBD1 & 2 KW850 Oxygen Scanner
KONNWEI KW850 OBD2 Scanner Professional Auto Code Reader Car Diagnostic Tool Check Engine Light Scan Tool for OBD II Cars Since 1996 (Genuine Version)
4.64.6 / 5
Konnwei OBD2 KW850 is a small adapter that makes finding the cause of the check engine light warnings or trouble codes become evidently much easier.

Features And Functionalities Of KONNWEI KW850

The futuristic-looking Konnwei OBD2 KW850 scanner is effective in its functionality thanks to the following key features.

The tool checks Oxygen (O2) sensor systems and reads On-Board Diagnostics (both OBD I and II) for American vehicles built since 1996.

This gadget can access your manufacturers’ specific diagnostic codes (OEMs) in addition to generic diagnostic codes. It is better than the aftermarket codes and definitions other scanners provide.

This tool can read and freeze frame data. Frame data is the data recorded by a car in the event of an accident.

The KW850 solves emission and checks engine light related trouble codes through its fix codes database. You can read the record and print real-time vehicle data with this tool and monitor the battery voltage, temperature, and the engine’s r.p.m.

You can also read and erase transmission and check engine light trouble codes with just a push of a button.

Compatibility Of KW850

The Konnwei OBD2 KW850 works on petrol and diesel passenger cars, SUVs, and light trucks, built after 1996. The device is compatible with all PC and Android systems except iOS.

Software And Update Of KONNWEI KW850

The Konnwei OBD2 KW850 has over 3000 built-in generic codes and an extensive database of code fixes that are certified by professional auto-mechanics.

The package comes with a CD that contains software for installation on your personal computer or laptop. With the software installed and the device connected via USB, you can always check for updates.

The gadget’s software provides I/M key car readiness status and monitoring on a graphical view.

The gadget also has detailed information concerning any vehicle, such as VIN (Vehicle Identification Number) and CID (Calibration Identification).


  • Unique, ergonomic, and compact design: Its great design makes it easy to hold in one hand.
  • Excess voltage protection: You can check the performance and record live data as you drive.
  • Compact, strong, and durable: Its interface makes it simple for one to navigate without any complications.
  • Works on both petrol and diesel motor vehicles.


  • KW850 does not work on heavy-duty trucks
  • It is not compatible with iOS devices.

The Konnwei OBD2 KW850 offers both basic and professional scanning capabilities. This means it can be used by either car owners, DIYers, and car enthusiasts.

You’ll be able to accurately determine the cause of the engine trouble codes and make the right repairs. Quality diagnostics and fix codes are a guarantee since the gadget is equipped with code fixes that have been thoroughly checked by experienced auto-technicians.

Take this OBD2 scanner if you have a gas engine made from 1996-present or a 1997 and newer diesel one.

Check Price at Amazon

Bonus: KONNWEI KW818: OBDII Car Diagnostic Tool Review

The Bottom Line

You don’t have to lift the hood to check for your car’s diagnostics. By plugging in the Konnwei OBD2 KW850 to your OBD2 input port, you’ll receive the manufacturers’ specific and generic codes immediately. Yes, accessing your car’s computer is that easy.

One of its outstanding features is its ability to read oxygen sensors. You’ll be able to notice when your car is having problems with its air intake pipes. If you also want to obtain precise car diagnosis for either individual or professional use, then this is the go-to OBD2 scanner.

You won’t have to sacrifice durability or quality performance since this gadget will do the car’s diagnostics and oxygen scans with pin-point accuracy and clear all problematic codes.

A video about Konnwei KW850 Universal OBDII Diagnostic Code Reader

Bonus: Autel MK808: Full-System Diagnostic Tool Review

Tim MillerFounderOBD Advisor

I’m Tim Miller from Denver, Colorado. I’m the founder of obdadvisor.com, an automotive blog about "Auto Diagnostic Tools and Repair Guides". My fan page is facebook.com/autozikcom. I've been working as an automotive mechanic and blogger for over 10 years writing articles to share my experiences and expertise.

Web: https://www.obdadvisor.comEmail: [email protected]
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81 thoughts on “KONNWEI KW850 Review: A Reliable Multifunctional OBD2 Scanner”

    1. johan melcherts

      I bought a konnwei kw850 a few weeks ago. but can not read my 2005 Nissan murano, it gives a communication problem. how can it be solved and is this known. otherwise it is of no use to me. a greeting, johan

          1. What is a test value fail with 56320 mean I can’t find what’s fail part is on the obd2 reader

    1. Hi will this work with a 2019 kia picanto, 2014 ford px ranger, a 2016 alfa gulietta and a 2004 toyota camry these are all my family’s cars trying to find a compatible tool for most of them

  1. Hi,

    Will this work with mercedes A-class -12/13 to release the handbreak wich is electronic?
    Or do I need to update it? I got software 2.0. Tried this morning with no success 🙁

  2. Hi Tim,
    I just bought my KW850 from China and all the time I use in Japanese cars 1997 onward models it gives me an error message “Error in communication with vehicle ECU”. I made sure the tool is connected to the vehicle’s DLC, the ignition is ON and the vehicle is OBD2 compatible. I even updated the tool online.
    You have any idea of what can be done to make it work?


  3. Hi Tim, Does this work on Opels? 2000 and up?
    i have tested and nothing seems to be working on multiple opels.
    I’m getting an error ECU message.


  4. Hi Tim,
    I just bought my KW850 using on isuzu pick up fleetside kb 2000 model 2008 it gives me an error message “Error in communication with vehicle ECU”. I made sure the tool is connected to the vehicle’s DLC, the ignition is ON and the vehicle is OBD2 compatible.

    1. The code or the check engine light will return (after a day or right when you restart your engine) if the issue is not fixed. Then it’s important that you find and fix the problem behind the code before clearing it or resetting the CEL.

  5. Hi. I recently bought a kw850. I tried it on my Golf 5 2005 model and it gi ves me an error message. What could be the problem?

  6. Good day Tim, I’ve got a konnwei kw680 trying to communicate with the obd2 on a corsa c 2007
    The unit powers up when plugged in but does not communicate with the vehicle ecu..Please help


  7. Goedendag Tim De konnwei KW850 had de eerst Paar keren wel Communicatie met mijn Seat Ibiza diesel 2012 , maar nu geen communicatie meer mogelijk.Wat kan de reden hiervan zijn? Daarna ook nog geprobeerd op een Touran, ook geen communicatie mogelijk.

  8. Phil Turkington

    Hi Tim,
    I enjoyed you review on the Konnwei KW850, thanks you.
    I am wondering if this unit would be compatible on a 2002 Range Rover Vogue HSE L322 engine?
    The 2002 RR L322 is showing Air Suspension / Air Bag Fault.
    I have seen a Konnwei KW850 for Sale near me here in Perth, Western Australia, however, the seller is not able to shed any light as to compatibility of this unit to a 2002 RR L322.
    He is asking $80 AUD for it but if it doesn’t work on a @002 RR L322 then my money is wasted and would be better to put it towards a Unit that will reader the vehicle in question.
    Appreciate any suggestions you may have
    Perth, Western Australia

  9. Rotimi Akande

    Please can Konwei k850 check for transmission and Abs or which scanner will be suitable for me as an automobile engineer

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