I think it depends on when exactly the O2 fails, at to what code it will set. This one only gave me a P1131. [1997 Ford Contour, ECM/Inputs/Outputs Scandata]

Whe the O2 was relitively cool, it worked fine. [1997 Ford Contour, O2S Scandata] So it would test f... Login to read more.

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