I've had hptuners for maybe 5 years or so but never had any real issues. Today I started my car, plugged hptuners into the obdii plug and the ses light came on. When this happened the car started running a little rough and the tach would bounce from 0 to 600. The car remained running, rough, but the tach was usually at 0. I tried to connect to read the codes but the program stated that there was no power and the key needed to be in the "run" position.
When I would unplug the obdii plug the issue cleared up but immediately returned when I plugged it in, I never actually "connected" to the car to start the scan.
I grabbed another scanner and read a code of p0700 - trans control system error and u0073 - control mod combus off. After clearing these codes I restarted hptuners and re plugged the module into my laptop then the car; it now, finally, connected and started scanning.
After driving for about 15 minutes the car had a major hiccup and started running rough again. Since I was scanning with hptuners I scanned a code of p2135 - throttle pedal position sens/sw a/b voltage correlation. While driving I cleared the code but it came right back. Tps was now stuck at 27% and the car was in limp home mode / reduced power mode and was not capable of going faster than about 27 mph while running very rough. I unplugged hptuners, cleared the code with my other scanner and I drove for 60 minutes after this without issue, without hptuners.
Hptuners is clearly causing some issue with the data bus communication. Anyone have any experience with this?
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Originally Posted by SultanHassanMasTuning
