Dodge techs question

Posted By: Dcuda69

Dodge techs question - 01/26/11 11:13 PM

I have an 04 Ram 5.7. Check engine light came on...scanned it shows:
PO137 O2 sensor 1/2 voltage low
PO157 O2 sensor 2/2 voltage low
Any common problems you guys see,I have a hard time believing 2 O2 sensors died at the same time?? Open for ideas. TIA

P.S forgot....truck has 55k on it.

Posted By: dennismopar73

Re: Dodge techs question - 01/27/11 12:14 AM

they have issues with connectors corrode up
check all connections first
then check youre ref voltage,
where does it go away at

they also have issue of wiring getting hot melting by firewall

Posted By: Dcuda69

Re: Dodge techs question - 01/27/11 01:00 AM

Thank you. I will check that out.....I had one unplugged,didn't see issues with the connector..I will look closer. wiring by the firewall?? Which side? I'll look for that also. Any more ideas anyone?? Thanks again!!

Posted By: 71yelladustr

Re: Dodge techs question - 01/27/11 03:44 AM

Check for wiring to the PCM rubbing against the a/c lines and back of the engine causing a short to ground also. Don't be surprised if the PCM has taken a dump either.

Posted By: Dcuda69

Re: Dodge techs question - 01/27/11 03:48 AM

Great.....thanks for the reply,I'll have to start digging. Hope it's not a PCM issue. Thanks again,I'll try to post back if I find anything!!

Posted By: 71yelladustr

Re: Dodge techs question - 01/27/11 11:23 PM

If it is a pcm issue it should be warrantied for 8 yrs/ 80k.

Posted By: Dcuda69

Re: Dodge techs question - 01/28/11 11:17 PM

Quote:

If it is a pcm issue it should be warrantied for 8 yrs/ 80k.

Good to know...Thanks again!!

Posted By: Dcuda69

Re: Dodge techs question - 05/07/11 01:18 AM

Thanks for all the help and ideas. It turned out to be both post O2 sensors. Strange I know, but put both in over a month ago now......no codes so far! Figure I'd post the fix in case anyone else has the same issue! Thanks again for the help!