what to do if it say system too lean (bank 1 )
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1997 Ford F-150 Question: what do i do if it say system too lean(bank 1 )
Answer #1ZeeTech February 03, 2011, 12:34Master
You take it to a shop where a confident technician could diagnose a lean condition which could be caused by quite few different things.
Answer #2F-150XLT February 29, 2012, 14:09Rookie
Its more likely the Oxygen sensor #1. There are other parts that mimic that symptom, but usually is the OS.
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