Konnwei KW808 diagnostic scan tool is a reliable and accurate diagnostic code reader. It is affordable but still performs the functions of top-range scan tools. It has a large screen that makes the reading of error codes to be easy and quick. This scanner supports all 9 OBDII test modes on all OBD2, EOBD, and CAN-compliant vehicles. It covers vehicles manufactured from 1996 to and current, such as Ford, Chrysler, Honda, Toyota, Nissan, etc.

You can utilize it to detect pending codes, retrieve vehicle information, read live PCM data stream, display monitor and I/M readiness status, and many other functions. Read our Konnwei KW808 Reviews to learn more about this scan tool.

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Technical specifications

Konnwei KW808 OBD2

Works: ALL 1996 and later vehicles
Display: DTC definitions on unit screen
Check Engine Light(MIL): Easily determines the cause
o2 sensor test data: Yes
Reads live PCM DataStream: Yes
Identifies pending codes: Yes
Playbacks Live Sensor Data: Yes
Reads and stores Data: Yes
Playbacks live sensor data: Yes
Clears codes & resets monitors: Yes
Graphs data c (1996 and newer): Yes
Retrieves vehicle information: VIN, CIN, and CVN
Views freeze frame data: Yes
Prints data via PC: Yes
Reads live PCM datastream: Yes
Software Update: Free Updates via the Internet
Prints data via pc: Yes
Get transmission codes: Yes
Price: Konnwei KW808 ReviewCheck Today’s Price

Summary of Contents

Konnwei KW808 Reviews (With Video):

The Konnwei KW808 can be upgraded via the internet, and it supports CAN and has memory/battery for backup or off-vehicle information. This is definitely an amazing scanner for both mechanics and DIYers to diagnose the toughest error codes on your vehicle. You can also take a look at the Ancel AD310 Universal OBD II Scanner, which price is almost the same as Konnwei KW808.

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Diagnostic Features

Sturdy construction

Like Autel AL319 and Foxwell NT301, Konnwei KW808 is a sturdily constructed scan tool. It is made from a durable plastic casing that can resist tough conditions that the mechanic or technicians work in. This makes it a durable device that can be utilized for a very long period of time by the user. In addition, it has a carry case for easy transportation and storage.

Easy to use the device

If a scan tool is complicated or has a wide range of features, it might be difficult to use. This is not the case with the Konnwei KW808 diagnostic scanner. This is because it has an easy-to-use interface and a large easy to read backlit LCD screen. Hence, you will be able to read clearly clear codes.

Related article: Is it worth buying an upgraded Innova 3030 code reader?

Software upgradeable

One of the features that mechanics look for in a scan tool is if it is upgradeable or not. A good scan tool should be updateable so that it can be used to scan the latest car models. Konnwei KW808 diagnostic scanner can be upgraded via the internet. All you need is to connect it to a PC by use of the USB cable and upgrade the software.
konnwei kw808 obd2 scannerCheck Price

Performs a wide range of functions

As simple and sleek as the Konnwei KW808 car scan tool appears to be, it is able to perform a wide range of functions. This means it can be utilized by both DIYers and professional mechanics. Here are some of the functions that it performs on different cars; it views freeze frame data, displays O2 sensor test data, displays DTC definitions, carries out modules present tests, retrieves vehicle information, displays monitor and I/M readiness status, and many other functions.

Battery/memory backup

In case your car engine runs out of power or if it is switched off, you can always proceed to scan error codes and clear them, too. The Konnwei KW808 diagnostic scanner comes with a backup battery that can power the scan tool even when the car is off.

The compact and portable device

The Konnwei KW808 device comes with a carry case for keeping it and for easy transportation. You can keep the USB cable and OBD2 linking port inside the bag. This will ensure the safety of the scan tool.

Wide vehicle coverage

This code reader model from Konnwei covers different car makes and models manufactured from 1996 and newer. Some of these vehicles include Toyota, Ford, Nissan, Chrysler, Honda, and other Asian and European 1996 and current vehicles.

Troubleshooting of the Konnwei KW808 OBD2 scanner

Problems Possible Cause Solutions
No Power Dead vehicle battery or loose connection Check the vehicle battery; ensure the OBD2 connector is firmly attached
Error Connecting Incompatible vehicle or faulty connection Verify vehicle compatibility; recheck OBD2 connection
Inaccurate Readings Dirty or damaged connector pins Clean or repair connector pins
Device Freezes Software glitch Reset the device; update software if available
No Codes Found No faults or device error Recheck with another scanner if necessary
Intermittent Function Loose cable or poor connection Secure all connections; check for cable damage
Blank Screen Device fault or power issue Check device power supply; consider device repair or replacement

Comparison Table: ‎Konnwei KW808 vs. Konnwei ‎KW850 OBD2 Scanner

Features KW808 KW850
Dimensions: 9.96 x 7.28 x 2.68 inches 9.46 x 3.94 x 2 inches
Weight: ‎ 1.54 pounds ‎ 1 pound
Display Size:   2.8 inches 2.8 inches
DTC Look-up & Definition:   No Yes
O2 sensor test data:  Yes Yes
Views freeze frame data:  Yes Yes
Price:  Low Medium

Advanced version Of Konnwei KW808:

Konnwei KW902

Konnwei KW450

Bottom Line

At such an affordable price, you will get to read and erase different fault codes on your car. Unlike other professional scan tools, the Konnwei KW808 scan tool is very easy to use, with a simple-to-comprehend interface and a large TFT backlit screen. The scan tool is upgradeable over the internet and covers vehicles manufactured from 1996 and newer. Get to perform various functions like displaying live O2 sensor test data, viewing freeze frame data, retrieving vehicle data, and many other functions.

Setbacks of the Konnwei KW808 scan tool

People Also Asked

-Included Accessories:
-User Manual & CD
-OBD2 Cable
-Plastic Carry Case

Is your vehicle’s control module defective? Check it first. If not, then ensure the ignition is on, and the scanner is connected properly. Now turn off the ignition, wait for at least 10 seconds, and then turn on the ignition. The connection will be restored.

You need to reset the tool. To do this, just hold the power button for two seconds. Then turn on the ignition after 10 seconds. It will be as fast as before.

-Maybe the connection is loose.
-The DLC pins might be broken, bent, clogged, or corroded.
-The battery may be damaged.

Comment below if you have any additional questions after reading our Konnwei KW808 reviews.

Kevin Nicholas is an automotive technician who is a genius at software and hardware-related issues. He manually tested more than a hundred OBD scanners and gave his honest opinion on whether the device was worth the money or not. His in-depth OBD review articles help people choose the right product, whether it is a European, American, or Asian vehicle. He completed his Automotive Specialized Training Course at Universal Technical Institute and has more than 15 years of experience in the field.

50 Responses

  1. Purchased today,read instruction manual,which had at least 4 spelling errors.Hope that no more important information errors.looking forward to using this unit. Thanks.

    1. One of The cables that come with it has correct connectors from it to pc usb port.

      1. there was no second cable which should be an adapter consisting of a 15 pin male connector to usb, just like the one connecting to the car, but with an USB end instead.



  2. absolute piece of crap, avoid at all costs, tried on three different cars, Mercedes e 320cdi, jaguar xk8 and Vauxhall astra 1.4 turbo, showed one code on all of them on first screen but none further on in current codes. none of the other functions worked on any of the cars even though listed as been able to connect.

    1. Konnwei KW808 don’t mention clearly which brand/model actually this scanner support. I tested this tool my Ford R7 and Jaguar XE. It worked on Ford R7 but didn’t work Jaguar XE. I have mentioned this in my article setback area. However, I didn’t expect much from a $40 scanner. I will suggest, check this article scanners list and buy one of them. I didn’t get negative feedback from those scanners.

  3. Is there anybody who could help me how to start new Diagnostics on my KW808 scan tester? Every time I want to start new Diagnostics in Main Menu the following window will appear saying “Erase previously stored data to save data from this test?” If I ENTER YES shortly after will appear System Status for a very short period of time and after that, it jumps to Diagnostic Menu on the first item Read Codes. In other words if I enter yes, the previously stored data will do be erased and it makes me impossible to continue further with the test. Once again, how to erase all data before starting performing so that it allows me to perform a new diagnostic test. Thanks

    1. go ahead and erase codes then go to read codes and hit enter and it will go to option of stored codes or pending codes.

  4. I bought a KW808 and can’t get it to read live data on my 2002 Kia Rio. Any ideas. Can it be upgraded on internet? All inputs will be appreciated. Mike

    1. Apparently this rubbish only reads 2006 on, IF YOU ARE LUCKY. Like many other reports, it would appear that these things are a money making scam. I have yet to read anywhere that someone has had any joy with one of these. I bought it to read My Kia Sorento, it does not recognize it. A complete waste of 40 quid.

  5. i waste my money for nothing I just recieved my Item today and sad to say it can not be connect hw many times I try to do it but totally its not connecting

  6. Hi I’m looking for a cable from machine to laptop I have the disk I need to download the software where can i find it

  7. I have just purchased a Konnwei KW808 SCANNER but will not work on my 2018 Suzuki Swift 1.2 . Can anybody please help me on this one. Thanks in advance.

  8. Please could u help me im looking for a cable to dwnload software ita a 16 pin cable with usb finish its for konnwei 808 dianostics machine

  9. As mentioned above every time you plug this scanner into a car it asks you if you want to erase previous data. This will probably be key for when you connect it to a computer. As you will tell it no once connected. I think you’ll be able to look over data from your last scan in the konnwei software too.. I would assume. To connect this device to a laptop/desktop I would imagine you would need a db15 vga to hd15 vga adapter (about $13 on amazon, here’s a link)
    and a hd15 (normal vga) cable to connect to your computer.
    If you computer is newer like mine and does not have a vga port you will need a hd15 vga to a usb 3, usb c, or hdmi adapter depending on what you do have. Does that help?? Remember this is all theoretical, I haven’t done this yet with my own kw808 but I can’t imagine why it wouldn’t work this way. The device has update software but only one port on the whole thing. So it’s gotta work this way. I’m just waiting for my adapter in the mail.

  10. Hello, I tried the KW808 on the Isuzu Dmax 2004 to scan because it has a Check Engine Light, the Engine communicates but it does not identify the cause of the Check Engine. Is there any way or adjust the settings to make it work?

  11. Anyone saying VGA or HDMI(Hi Def multimedia interface) should realise these are graphics connectors not data and the 808 connector is not the same as VGA.

  12. I purchased the machine it worked on ford ranger T6 and VW Golf but on Toyota ( Allion & 1KD ) it failled to connect.Any help please. How can this KW808 updated since it has no usb port?

  13. Hi just bought my Konnwei 808 but it does not want to connect with any car keeps saying ” Linking error ” tried it on Toyota and vw say the same thing

    Please help

  14. I am disappointed in the feedback team. People keep on asking what internet link can be used to update KW808 software no answers given.bad customer support Services.

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