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P0170 Diagnostic Trouble Code Discussion for July 2006

Fuel Trim Lean Or Rich (Bank 1)

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Trouble Ticket Help Requests for DTC P0170
Help Request Posted
1999 Subaru Forester S 2.5L Poor Idle Quality, Hesitation, MIL Lamp on, Spark knock VIN: JF1SF6556X
P0170: Fuel System Too Rich Or Too Lean (Bank 1). Customer complaint: MIL on, Hesitation, low/rough idle. Had code PO170 stored and sometimes returns after a few drives. I have verified the running issues and noticed severe spark knock on medium to heavy acceleration. MAF signal was a little low @ 2500RPM. Re...
July 19, 2006