Getting all 4 o2 sensor codes with check engine light on

[Casey]

First off, this is an amazing forum. I am a truck enthusiast and finally went back to my beloved Dodge Ram. I have an 04 HEMI 2WD qua cab that has a check engine light on. I had the codes read and it showed the 4 o2 sensor codes. I don't have the list in front of me showing the codes, but I find it hard to believe all o2 sensors are faulty. The dealership did a diagnostic and said all tests passed, voltage was good, etc. anybody had this problem or can anyone shed some light on this? Truck is running fine, but I hate that stupid light being on.

 

[KGBIGCOUNTRY]

Welcome buddy, did they test the o2's out the truck to see how they are reading or in the truck with the StarScan?

 

[Casey]

They told me that they tested voltage at the sensors and replaced 2 of them, which I verified. It's still showing p0137, p0152, p0157, and p0158 which are all 4 sensors. They said it could possibly be the ECM. I'm just stuck and don't want to start pouring money into something for a possible fix.