Quote:
Originally Posted by DFBonnett
From the codes it seems as if the bank 1 O2 sensor has failed. That is going to be the cylinder bank which includes is cylinder 1. That will be the bank by the firewall. I believe you will need to replace that O2 sensor as cleaning them generally does not prove efficacious.
FWIW
YMMV
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Sensor replaced and it looks like the problem is resolved, many thanks...