KONNWEIKW206 Car OBD2 HUD Digital Meter Gauge All in One Automotive Trip Computer Smart OBD Speedometer Water Temperature Fuel Pressure Tester for All 2003 and Newer Cars

My wife drives a Chevy Sonic that has one of those terrible displays that shows very little live ECU data. A previous owner had chipped out the check engine and oil pressure lights from the dash, so an oil consumption issue (poorly engineered engine) caused it to run down to a half quart of oil and fry the piston rings. I tore apart the dash and discovered the chipped out diodes, and replaced the dash. It still didn't have much info. I replaced the engine (my wife loves the car) and apparently didn't connect a coolant hose to the heater core correctly. It was probably driven 150 miles until the hose popped off and sprayed coolant all over the engine. Thankfully, I pulled up to a stoplight and saw the steam. I probably wouldn't have noticed it if I was driving and it was blowing under the car. I would have had no idea that the engine was heating up until the check engine light popped on, because it didn't have a temperature gauge. This device not only gives a live display of the coolant temp (and multiple other data feeds), but you can set an alarm to go off if a data stream exceeds a set value. It should not be a needed device, as the car manufacture should make a dash that displays this useful data, but this little thing works quite well. The alarm gives me peace of mind that my wife should catch issues before they become drastic, and the live data readout is nice for when I am working on or diagnosing problems. It saves me having to bring my code reader from my other vehicle. All-in-all, this device is a great value.2 YEAR UPDATEThis thing still works great. It is able to read OBD II codes, but won't clear them. I've only tried it on one car, so it may be related to the make/model. If I need to, I just use my code reader to clear a code. For live data display, it works great. It turns on and off with the car and provides a good display for helpful data.

I wanted a tach for a long time. It’s just the right size to sit on the dash without obstructing the view. Easy to see and to install. Works as expected.Also appreciated the free gift of a hard wire kit. Excellent customer service service.

On my 2002 Silverado it hooked up and worked well for a little while right out of the box...the tach was accurate and responsive, temp was accurate as were trip and speedometer. But hit one bump and the instrument face developed a black box in center of screen and then the RPM values went all wonky...had to be reset every minute or so, something internal seems to have been poorly soldered or some such. It CAN be switched from metric to english temps and mph, others say it can't but mine could. As a functioning plug-and-play gauge it's not very useful to me BUT...when you dig into it's ability to read the data stream then it gets useful. It reads O2 sensor voltages, airflow volume and temps, tps and a few other things that are really nice to be able to monitor. My vehicle had no codes to read or reset but this ought to be able to do both so that's a potential plus. I'm sending mine back to see if I can get lucky with a better built unit because the design concept is excellent but I'm not holding my breath. Long and short...as a functional reliable gauge for daily driving I think it's junk but as a diagnostic tool I think it's not bad so buyer beware and good luck.Weeks later....this thing seems to work fine in my 2003 Grand Marquis. This car has no tach so I tried the obd2 gauge again on the Merc and damn but it works very well....zero issues. It has read and cleared 2 codes just today...both were legit codes and I know what caused them, it does not have the "black box of shit" overlaying the tach like it did in the Silverado. The tach has no latency issues, it reads mph within 1mph of the dash gauge, temp seems reasonably accurate so I have to say ...... this gauge seems to work well on some vehicles, less well on others. In my Mercury, it's a keeper.a week later....it still works....go figure. I guess it likes some vehicles more than others.18 months later...it's still a little twitchy but it's still doing it's job in my daily driver...2003 Grand Marquis. It still reboots at random times and sends a warning beep for no apparent reason but it also does a good job of monitoring RPM, speed, temp, timing and voltage...I'm used to the hiccups and I've come to rely on it a lot...so for my application I'd give it a 4.5

Worked fine for about a month (exactly one month to the day). Then, get in the truck today, crank the engine like normal, and instead of coming on the way it normally does, the Konnwei screen flashes and it makes an audible beep. Buttons still work and screen is on, but it will no longer connect to the ECU. I test my OBD port with another scan tool and it is fine. Konnwei has just decided it doesn't want to OBD anymore. I thought maybe if I updated the firmware there was a remote possibility I could trick it into behaving. I went to the official website to download the update tool. Invalid RAR file. How embarrassing. I've yet to see how their customer service is, but I'm not expecting much.Update: Customer service is even worse than the device. I had to send 2 emails over 2 days to their customer service before they even initially responded. Then, days would pass between volleys with me having to send reminder emails to spur them to respond. The final communication was them asking for a video of what was happening. I sent this, but then they went silent forever.