Hi, Can anyone help me with this? I have had missfire problems on cyl 3 and 4 on my MY01 XC70 AWD. Before maintenance I read and cleared the codes - the readiness code was OK. Now post maintenance the engine will not start but tries to do so. However the state of the readyness code has changed. This seems to be associated with an O2 sensor problem. My engine is the B5244T3. I understand this version has two O2 sensors. How do I set about diagnosing this problem and how do I access both sensors? Do I need any special tools? Any help is very much appreciated.
Bookmarks