Jeep Wrangler Forum banner

1 - 4 of 4 Posts

·
Registered
Joined
·
1,006 Posts
Discussion Starter #1
I was getting all 4 O2 sensor heater circuit low codes and based on having folks check out the O2 sensors, it really looked like a PCM issue. So I bought a reman PCM from Solo Auto and popped it in this am. Now I'm getting a P0038 which is driver's side downstream O2 sensor voltage high. I'm guessing this might actually be a problem with the O2 sensor, either that or the wiring to the O2 sensor, but at least now I'm not getting all 4 voltage low codes. Any thoughts on next steps? Get the Jeep up on a lift and take a look at the wiring and maybe just replace that sensor?

Ian
 

·
Registered
Joined
·
1,006 Posts
Discussion Starter #3
I did sort it. Pulled the 2 downstream sensors and tested them with a multi-meter. One had failed closed (which maybe what caused the PCM to fail). Replaced it, all good now.


Sent from my iPhone using Tapatalk
 
1 - 4 of 4 Posts
Top