Anyone else have to replace their tire ECU? I've had intermittent trouble with reading the pressure, even when the tire sensors were new. Now I have no reading at all and I get the warning on the dash. The sensors are still sending a signal. Does this soundlike a bad ECU? I'd hate to throw the money at it if that's not the problem, but there isn't that much to the system. It's the 4 tire sensors, the 4 readers at the wheels and the ECU. Since it's not reading anything, I suspect it's the ECU. Anyone else have this problem?
How do you know that the sensors are transmitting? I have never used one but I know there is testing equipment for this type of system. I would start with a shop that has the equipment to test/diagnose the system and go from there.
I had TPMS issues this winter whenever the temperature was cold...lets say less than 50-degrees F. I would get the TPMS warning (generic TPMS SYSTEM FAILURE with no associated data, and I did not look at the individual tire pressure readouts so I can't say how they appeared at the time) during the initial cold start, but on subsequent restarts after driving the car for a bit, there would be no TPMS warning. My tires were definitely not underinflated during any of the times that I got a TPMS warning. Yes...the fact that the TPMS warning was absent after the tires warmed-up sounds like it might be related to a tire pressure issue, but I wouldn't be surprised if a main battery or TPMS battery voltage drop due to cold temps might have something to do with it too. I just kind of shrugged it off as a minor nuisance. Now that the weather has been warmer, I haven't had any more issues. So in my case, it's not a big deal most of the time. Peter, maybe put a fresh battery in the car and see what it does?
I've seen a few of the TPMS ecu's fail now. Usually resulting in a "system not programmed" error on the dash.
My car did it again this morning. I got the TPMS FAILURE - GO TO THE DEALER warning again (outside air temp was probably 45-deg F.). Then I drove the car at lunchtime (OAT was probably 63-ish) and no TPMS warning at all. I always get a chuckle from the "GO TO THE DEALER" warnings....yeah, like I'm going to do THAT!
I’ve had aftermarket tpms wheel sensors that appear ok on a test tool but even though they code written for a 612 they just don’t read into the ecu. Autel mx sensor worked fine in the end. Also can take 30mins of driving to read in after calibration button is pressed. Mine is uk market 2006.
