1999 VOLKSWAGEN GTI CATALYTIC CONVERTER

  • Tiny
  • jimbo1976
  • 1999 Volkswagen GTI

Engine Performance problem
1999 Volkswagen GTI 4 cyl Front Wheel Drive Manual 90,000 miles

Failed Mot on CO =0.49 @2650rpm (fast idle) but passed rest of emissions test? Could this be sensor rather than a cat replacement?

Tuesday, October 5th, 2010 AT 5:56 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

Could be a defective coolant temperature sensor or the oxygen sensor that's causing the carbon monoxide to go high

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Tuesday, October 5th, 2010 AT 6:04 PM

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