07 1500 3.7L running lean and o2 heater circuit high

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IfYouCantDodgeIt

Junior Member
Joined
Mar 31, 2026
Posts
1
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Location
Alabama
Ram Year
2007
Engine
3.7
I've been trying to figure out what the issue is but afraid I'll have to trace wires. It started months ago with a high idling code but continued to run fine until one day going to work it started running rough like a misfire and showed running lean code p0171, changed o2 sensors all the way around then it showed the o2 sensor 1/1 heater circuit high code p0032. So I thought maybe injector might be bad, checked them decided to replace them all. Still having the same issues but it only acts up when the motor is at running temp, that's when it starts running rough. Decided to change the ecu out hoping it was just sending false signals but that didn't help either. I'm at a loss, I have a coolant temperature sensor ordered thinking maybe that could be it... anyone have any ideas? I'm at a loss and getting stressed
 

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