I have an A3 1.6 MPI 2006MY, which appears to have an intermittent fault with the upstream Oxygen sensor.
A diagnostic scan reports the following:-
"Linear oxygen sensor B1 S1 pump current trim circuit open P2626"
"Sporadic 008 implausable signal"
When I clear the fault code the Emission warning light goes off, but I noticed that the fault code returns but no warning light comes back on.
I assume I need a new sensor, but as these are expensive-around £150, and it is a pig to access, and is very tight, are the emissions affected,as its MOT is due shortly?
The car drives perfectly, and fuel consumption is excellent.