2004 Suzuki Verona Logo
Anonymous Posted on Mar 20, 2009

DIAGNOSTIC CODES Can anyone give me any help with the DIAGNOSTIC CODES P0171 & P0174 for my 2004 Suzuki Verona?

  • 1 more comment 
  • tdblack May 15, 2009

    I just bought a 2004 verona and it was low on fuel, after I filled it the light came on. It comes on stays on for days, will go off for a day or less and I notice it goes off when tank hits about half full.

    how does "Vehicle driven low on fuel or until it ran completely out of fuel" affect this and how do I fix it?

    Thanks

  • tdblack May 15, 2009

    I just bought a 2004 verona and it was low on fuel, after I filled it the light came on. It comes on stays on for days, will go off for a day or less and I notice it goes off when tank hits about half full.

    how does "Vehicle driven low on fuel or until it ran completely out of fuel" affect this and how do I fix it?

    Thanks

  • Anonymous Jun 24, 2009

    Thank you ewashmidas for your suggestions, I will try them.

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  • Posted on Mar 20, 2009
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Here are the possible causes for the PO171 and PO174 codes:


  • Base engine mechanical problem affecting one or more cylinders
  • Check for air leaks after the MAF sensor
  • Check for air leaks in the Air Induction system (e.g., in the intake manifold)
  • Check for air leaks in the EGR system and in its related hoses and/or valve
  • Check for air leaks in the PCV system and in its related hoses and/or valve
  • Fuel control sensor is out of calibration (e.g., ECT, IAT or MAP)
  • Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
  • Fuel injector (one or more) dirty or pressure regulator has failed
  • HO2S has failed (it may be contaminated with fuel, silicone or water)
  • Vehicle driven low on fuel or until it ran completely out of fuel

Please let me know if this information is helpful. Positive feedback is appreciated. Thank You!

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