2004 ram 1500 p0155 comes and goes every few weeks or so.
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Joined: Jan 2023
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From: Wny
2004 ram 1500 p0155 comes and goes every few weeks or so.
I own a 2004 ram 1500 4x4 4.7L it runs excellent I love my truck but the CEL pops on and off and it always a p0155(o2 heater circuit failure) I have changed the sensor multiple times same issue and I have looked over the wiring multiple times I still haven't figured it out any suggestions would be appreciated.
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Joined: Apr 2010
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From: Clayton MI
IS the heater circuit failing? Should be a separate circuit for those, and likely a relay as well. Now, whether you can CHANGE that relay or not, is another problem altogether....
Moving to Third Gen Ram section for ya.
Moving to Third Gen Ram section for ya.
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From: Wny
Good idea thanks a million I did not think about that I will check it(probably just change it) and see what happens thanks again
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Joined: Sep 2007
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From: PA
I had a 2004 Ram 1500 5.7 that was giving me a persistent P0058. I swapped sensors, did a resistance check on the wiring, and finally concluded it had to be the ecm. Replaced the original with a used unit, not more error codes.... but I did have to pay the dealer to reprogram the ecm so I could pass emissions (they verify the vin in PA).