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Jonathan
Jonathan 8/18/2012
1995 Toyota T100 DLX 6Cyl3.4L - Engine
My truck showed a 170 code having to do with Fuel Trim. I never saw this code before. What does this mean? It runs fine.
1 Answer
  • Jimm
    Jimm 8/18/2012
    P0170 indicates a malfunction in the PCM control of the air-fuel ratio. Bank 1 is the side of an engine that has cylinder 1.

    Here are the possible cause of P0170

    • Dirty or defective MAF sensor
    • Vacuum leak
    • Defective fuel pressure regulator
    • Defective O2 sensor
    • Oil contamination in the cam/crank sensor wiring or MAF/O2 sensor connector
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