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Re: Malfunction of B1S2 as a Reason DTC P0171
Posted to Technical Discussion Forum on 10/15/2014 2 Replies

Wladimir,

I didn't watch your video, but many manufactures for a long time, at least 1997, have used rear O2 for fuel trim. Normally, only the factory scan tool will show this data. Login to read more.

2 Replies Received (View Replies)