The yellow "Engine" light has come on.
4 Errors, but really 2 pairs...
P0150 $07E8 02 Sensor Circuit Bank 2, Sensor 1
P2247 $07E8 02 Sensor Reference Voltage Circuit Open Bank 2 Sensor 1
Repeated each start up
From looking at BMW forums it seems this isn't exactly uncommon and Sensor 1 is the pre-cat sensor, not sure if Bank 1 is left side or right side...
One of the Lambda post cat sensors was replaced under warranty last year. It seems to me that now the pre-cat sensor has failed.
Does anyone have any other suggestions but "take it back to the dealer" ?
Last edited by Peter J; 24/01/16 04:18 PM. Reason: Additional info