CHECK ENGINE LIGHT IS ON

  • Tiny
  • joshp
  • 2004 Isuzu Axiom
  • 6 CYL
  • 2WD
  • automatic
  • 99 miles

My 04 axiom is throwing 2 codes. P0172 and 1239. I have changed plugs, o2 sensors in the exhaust and fuel filter. Still hesitates with reduced speed light on

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Thursday, July 28th, 2011 AT 6:11 PM

1 Reply

  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

P0172 = Fuel trim too rich

P1239 = High fuel pressure system.

You need to check the fuel pressure regulator operations.

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Thursday, July 28th, 2011 AT 6:28 PM

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