PO134 2001 volvo S-80 2.9

Question

2001 Volvo S-80 check engine light code reads PO134, what is it and what to do?

Answer 1

Hi there,

The code is for one of the front heated O2 sensors. The problem with the code is it isn't specific to bank one or bank two, so what's really needed is a scan tool that can read the live data so you can determine which side of the engine is bad.