I have a V6 petrol Bighorn and 75% of the time I use it the Check Engine light comes. It stays illuminated as long as have the foot on the accelerator and goes out when coasting. There is no noticable affect on the running performance when light is on. I have tried to get a diagnostic code flashed (OBD1) but it flashes the code for no fault found.
This happens after about 20 minutes of driving which made me initially think it was a problem with the O2 sensor. Apparently this could happen with unheated sensor models as the sensor is locked out by the ECU until the exhaust is up to temperature, but I think I have a heated verson.
Tuesday, October 9th, 2012 AT 11:51 PM