Check engine light is on. If I reset the light, it won’t come back on as long as the engine is running. When I shut it off and restart, the light comes back on immediately. Autozone’s reader gives two codes. Both are for oxygen sensor heater (one for sensor 1 and one for sensor 2). I replaced the cat and both sensors and still get this code. One person suggested that the problem lies in the computer itself. Thoughts?
Safado, IMHO, expecting posters to help us help them is reasonable. Jason, If you don't have the codes then look at the wiring & harness going down to the O2 sensors. There have been a couple of reports where the wires have become frayed and caused problems. -B-
No worries. I'll go back and have them rescan it. I wasn't paying attention to the actual code numbers, just the description after each one. I'll post back later with the actual codes.
Jason, P0131: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1) P0141: O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2) Do you have the FSM for troubleshooting these codes? If not, here are some general things to check. (HO2S=Heated O2 Sensor) · Contaminated HO2S sensor or connector (coolant, water, silicone, fuel, oil, etc.) · Chafed/damaged wiring · Crossed HO2S signal/signal return wiring · Short to VPWR in harness or HO2S · Water in harness connector · Open VPWR or GND circuit · Poor electrical connections from PCM to HO2S sensor · HO2S heater Someone else will have to post the troubleshooting steps for your 95. -B-
