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
![]() KONNWEI KW850 | ![]() Foxwell NT301 | ![]() FIXD |
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Customer Rating | ![]() | ![]() | ![]() |
Price | ![]() | ![]() | ![]() |
Product Dimensions | 9.5" x 3.9" x 2" | 8.7" x 3.1" x 6.7" | 1.5" x 0.5" x 1.8" |
Item Weight | 1lbs | 1.2lbs | 0.96oz |
Reset MIL | ✔ | ✔ | ✔ |
Engine Diagnostics | ✔ | ✔ | ✔ |
Live Data/Freeze Frame | ✔ | ✔ | ✔ |
Check I/M readiness status | ✔ | ✔ | ✔ |
Full OBD2 Service Functions | ✔ | ✔ | ✔ |
Car, SUV, Light Truck, Diesel | ✔ | ✔ | Car Only |
Car Health Monitor | -- | -- | ✔ |
Bonus: Should you need something different, read the Review & Comparison of the 3 Best OBD2 Scanners 2020 HERE
Table of Contents

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
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).
Pros Cons
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 AmazonBonus: 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.
Is the KW850 compatible with the Mercedes BenzML 350 2007 and the Audi, 4.2 V8, 2005?
Yes but it wouldn’t work as perfectly as a scan tool that is built for Mercedes Benz.
I would recommend iCarsoft MB II for your Mercedes Benz. Read my review here https://www.obdadvisor.com/icarsoft-mb-ii/
For your Audi, Autophix V007 is the best choice. Read my review of the best Audi scan tools here https://www.obdadvisor.com/audi-scan-tool-review/
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
Sent you an email, Johan.
Saludo compre un scaner kw850 pero no consigo como imprimir
Lla que no vino con el CD. que puedo aser..gracias
Póngase en contacto con el vendedor para obtener ayuda.
Ist der KW850 auch für einen Mercedes Sprinter 316 Bj:2016 kompatabel?
Yes, it is. (Ja, so ist es.)
Hi,
Will KW850 work with 2000 bmw e46 ?
Sure. It does work well on your bmw.
What is a test value fail with 56320 mean I can’t find what’s fail part is on the obd2 reader
What I know is that you may have a problem with “Cylinder #5 Misfire Detected”. The code is P0305. Read more about the code here https://www.obdadvisor.com/p0305-code/
Ja, so ist es. (Yes, it is)
Can I reset brake light after changing brakes usin kw850
Afraid not. You need to take any the the scan tools on this page https://www.obdadvisor.com/abs-code-reader-review/
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
Thanks
Hey Tyson,
Konnwei KW850 is the right choice for you if you have different makes and models. It does work well on your kia, ford, alfa, and toyota.
This is one of the best OBD2 Scanners today.
Read the honest review now https://www.obdadvisor.com/konnwei-obd2-kw850/
best
Can I use this for the Peugeot and the Japanese vewhicles.
Yes. Sure.
I have one also, but its not working om diesel engins. Can i fix it With an update?
If your engine is old (around 1996 and before), it may not work. It can work well on all 1997 and newer diesel engine. Read more now https://www.obdadvisor.com/konnwei-obd2-kw850/
Will a 850 work on the anti theft system of a bmw e46 2002?
Afraid not. You’d better get the Autel MK808 for IMMO (anti theft). Check it out here https://www.obdadvisor.com/autel-maxicom-mk808-review/
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 🙁
Afraid not.
I would recommend iCarsoft MB II for your Mercedes Benz. Read my review here https://www.obdadvisor.com/icarsoft-mb-ii/
I tried the tool for Toyota Platz 2004 model but it is not compatible
Please contact the seller for support.
will this work on my 2004 Lincoln Navigator
Yes, Ronald. The KW850 does work well on your Lincoln. Take it
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?
Thanks,
Can I have more information about your cars? I think you have compatibility issues.
Hi
Will this model check airbag lights
Nissan 2009
No, KW850 doesn’t check airbag lights. You’d better take Foxwell NT630 Elite or Autel ML619 from this review https://www.obdadvisor.com/airbag-code-reader-review/
Does it support restring SRS or airbag light?
No. KW850 doesn’t support airbag light diagnostics and reset. You’d better take an airbag code reader. Check it out here https://www.obdadvisor.com/airbag-code-reader-review/. The Foxwell NT630 Elite is the best.
Hi will it work on a Mitsubishi Shogun mk3 2006 model
Yes. Sure, Peter. Take it https://www.obdadvisor.com/konnwei-obd2-kw850/
Does kw850 read your MAF sensor in grams per second and does it read knock retard in GM vehicles?
Sure, Josh. Take it.
will this work with Isuzu 4JX1 engine?
Can I have some more information about your vehicle?
Hi.
Please will it work for VW PASSAT 2001 model for all Faults that it has?
Afraid no. I highly recommend Ancel VD500 from this review https://www.obdadvisor.com/best-vw-scan-tools-review/.
For VAG vehicles, VD500 can read and erase codes on engine, ABS, Transmission, SAS, ESP, TPMS and other systems, reset the oil, brake pad, and throttle position adaption.
Can it programme new keys???
No, it can’t. You need Launch CRP429 https://www.obdadvisor.com/launch-crp429-review/
or Autel MK808 https://www.obdadvisor.com/autel-maxicom-mk808-review/
to programme new keys.
Can KW850 clear service light on Chevy Utility 2014 ? Can it clear airbag light on VW Polo 2014 ?
KW850 doesn’t clear the airbag light.
You’d better take Foxwell NT630 Plus or Autel ML619 from this review https://www.obdadvisor.com/airbag-code-reader-review/
Have 2006 aveo and Nissan NP200. Will it read all faults and Air bag problems? Thanks for the review.
No. I would take Foxwell NT630 Plus if I were you. Check it out here https://www.obdadvisor.com/foxwell-nt630-plus-review/
Hi Tim,
What scan tool would you recommend for an 03 BMW X5 3.0D?
Needs to check air suspension and abs lights….
I would take Foxwell NT510 for BMW if I were you. Check it out here https://www.obdadvisor.com/foxwell-nt520-vs-nt510/
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.
Thanks
S
Afraid no. Why don’t you take Foxwell NT301? https://www.obdadvisor.com/foxwell-nt301/
Hi Tim, will this work on 2003 Nissan Murano?
Sure. It does.
Can I do a manual dpf burn on a Subaru forester with the kw850
Afraid not. I highly recommend the Autel MaxiCheck Pro https://www.obdadvisor.com/autel-maxicheck-pro-review/
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.
What I’m afraid of is a compatibility issue.
Hi, does the kw850 work on a Peugeot 3007 and Audi A3
Afraid not, Alex.
I highly recommend
– Foxwell NT301: https://www.obdadvisor.com/foxwell-nt301/, or
– Autel ML629: https://www.obdadvisor.com/autel-maxilink-ml629-review/
If I use this to delete a code or to turn off check engine will it only remove it for a day or permanently?
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.
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?
What does the error message say?
Hello Tim,
Will it work on a Smart city coupe (450) from 2000?
Regards,
Daniel
Yes. Sure, Daniel.
Hi, can this unit resync bmw key fob to the immobiliser(cas)?
No, Timu. You need the Autel MK808 https://www.obdadvisor.com/autel-maxicom-mk808-review/
or Launch CRP429 https://www.obdadvisor.com/launch-crp429-review/
to do.
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
TIA
I’m afraid that the KW680 does not support Opels.
I highly recommend Foxwell NT301 (a basic OBD2 scan tool) https://www.obdadvisor.com/foxwell-nt301/ or
Launch CRP123E (Supports Full OBD2 test modes and 4 main systems diagnosis) https://www.obdadvisor.com/launch-crp123-vs-crp123e-vs-crp123x/
Hi Tim, will a Launch CReader 3001 or 3008 scanner also work on my corsa?
Hi why my konwei 850 beeps twice constantly when I check codes in my car ,engine running,anybody knows?
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.
Wat ik zou kunnen zeggen is dat u mogelijk een probleem hebt met compatibiliteit / voertuigdekking, wat betekent dat de scantool niet werkt op uw auto.
U kunt beter een scantool gebruiken die speciaal voor Seat is gemaakt. Ik beveel de VAG401 uit deze review aan https://www.obdadvisor.com/audi-scan-tool-review/
Please, will Konnwei KW850 work on Nissan Rogue 2008 model?
Sure. This scan tool can work very well on your Nissan.
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
Regards
Phil
Perth, Western Australia
Hey Phil, I’ve just sent you an email about this. Konnwei KW850 reads and clears engine fault codes only, not airbag codes. the Launch CRP123X is an excellent choice for your Range Rover if you don’t like the iCarsoft LR V2.0.
Check out my review and comparison here https://www.obdadvisor.com/launch-crp123-vs-crp123e-vs-crp123x/
Please can Konwei k850 check for transmission and Abs or which scanner will be suitable for me as an automobile engineer
Can you tell me more about your needs and budget?