Jonathan 8/18/2012

1995 Toyota T100 DLX 6Cyl3.4L - Engine

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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.

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  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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