Scanned my car (4.2 X150 XKR) for fault codes last night and found four, one for each of the four O2 sensors in the exhaust - P0031, P0036, P0051 and P0056.

Strikes me as unlikely that all four have failed at the same time. Looks like they're fed from two fuses (F33 and F34) in the engine bay fusebox and a relay (R12A) prior to that. Anything else I should check? Anyone know where the wiring from there runs?

 

My only thought is ... why aren't you watching THE OPEN instead?

 

Just got the same here, all 4. This ever get resolved?

 

My fuses 33 and 34 look OK

 

No, I never got to the bottom of that and eventually traded the car in. Suspect it could have been low battery voltage or they tripped sometime I had the battery disconnected.

 

What are your long-term fuel trims?
When the car is running, can you use your scanner to watch the o2 sensor voltage?