- Mar 14, 2007
That would be a good idea. The screws holding the metal case together must be on the bottom because looking at it, I don’t see any.Agreed. it is likely that the O2 sensors are not powered up when engine is not running.
If you still get no voltage at S101 when the engine is running, go back to C2 pin 74 on the PCM itself. Open up the PCM and read voltage right at the pin that is soldered to the PCB. Also, will be a good opportunity to do a visual check for poor solder connections on the PCB...