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Dodge techs question #914664
01/26/11 07:13 PM
01/26/11 07:13 PM
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Dcuda69 Offline OP
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Dcuda69  Offline OP
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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.

Last edited by Dcuda69; 01/26/11 07:16 PM.
Re: Dodge techs question [Re: Dcuda69] #914665
01/26/11 08:14 PM
01/26/11 08:14 PM
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dennismopar73 Offline
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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

Last edited by dennismopar73; 01/26/11 08:15 PM.
Re: Dodge techs question [Re: dennismopar73] #914666
01/26/11 09:00 PM
01/26/11 09:00 PM
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Dcuda69 Offline OP
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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!!

Re: Dodge techs question [Re: Dcuda69] #914667
01/26/11 11:44 PM
01/26/11 11:44 PM
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71yelladustr Offline
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71yelladustr  Offline
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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.


392 gen III hemi on E-85 727 trans Dana 60
10.02@134
Re: Dodge techs question [Re: 71yelladustr] #914668
01/26/11 11:48 PM
01/26/11 11:48 PM
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Dcuda69 Offline OP
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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!!

Re: Dodge techs question [Re: Dcuda69] #914669
01/27/11 07:23 PM
01/27/11 07:23 PM
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71yelladustr Offline
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If it is a pcm issue it should be warrantied for 8 yrs/ 80k.


392 gen III hemi on E-85 727 trans Dana 60
10.02@134
Re: Dodge techs question [Re: 71yelladustr] #914670
01/28/11 07:17 PM
01/28/11 07:17 PM
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Dcuda69 Offline OP
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Quote:

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




Good to know...Thanks again!!

Re: Dodge techs question [Re: Dcuda69] #914671
05/06/11 09:18 PM
05/06/11 09:18 PM
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Dcuda69 Offline OP
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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!







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