Please help me identify a fault code

Kalliopenyx · Post by **Kalliopenyx** » 12 Apr 2018, 19:18

I have a 2008 xc90. It's giving me two codes 147 and 151. I don't have a code reader either. Any help would be greatly appreciated.

Post by **ggleavitt** » 14 Apr 2018, 13:34

0151 is maybe a bad O2 sensor (cylinder 1,3,5), upstream (attached to exhaust manifold/catalytic converter).

No 0147 in my copy of VIDA, there is a 0137 for the same sort of error with the 2,4,6 cylinder upstream sensor, that could as well be it but I'm making an assumption.

Get some bad gas lately? Any mechanical work done on the car recently? Could check fuse in the engine compartment (think #14 is for O2 sensors). The best really is to get the car scanned with a Volvo centric tool to get to the error details, cut out the guessing.

*P-0147 shows up on the internet as a Bank 1 sensor 3 heater circuit, only 2 sensors per bank on this engine so must be another code being interpreted as 147 ?

Post by **mrbrian200** » 14 Apr 2018, 14:12

Generic OBD codes as displayed by a low cost code reader are becoming somewhat useless on newer vehicles. I looked on the internet yesterday (but didn't post) because I couldn't make a determination as to how relevant the information I was seeing was.
The only thing I would be confident with is that the heater circuit on one of the O2 sensors has failed. Determining which sensor seems like a guess as the diagram associated with these generic codes doesn't match the exhaust/catalyst layout on you car. And I don't see Volvo publishing (publicly available free of charge) any sort of documentation to explain what some of the generic OBD codes specifically refer to.