All O2 codes at once but truck runs fine

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63a

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Joined
May 5, 2015
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Ram Year
2004
Engine
4.7
04 4x4 4.7, 144k, truck runs great but CEL and trouble codes for all four O2 sensors (p0135, p0141, p0155, p0161). I need to get the truck inspected and the CEL is going to be a problem. Seems odd that all four sensors would go bad at same time so i suspect there may be another issue. O2 sensors were replaced apps 20k ago.

Anybody else have a similar problem?

Thanks
 

RotorHead04

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Dec 16, 2013
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Location
MA
Ram Year
2006
Engine
Hemi 5.7
Just because your O2 sensors are giving off codes doesn't mean they are bad. That is a big misconception. They are reading a fault in your air to fuel ratio. You are either too lean or too rich.
 

RotorHead04

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Have you done any recent maintenance or mods?
 

racer7

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May 6, 2015
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2015
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3.0
Needs a pcm, the codes are for the heater circuits, if you test it you'll find your missing ground for the o2 heaters
 
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