HC EMISSIONS HIGH 15MPH MAX 64 MEAS 145

  • Tiny
  • Anonymous
  • 1996 Toyota Corolla
  • 258,190 miles

Hc emissions high 15mph max 64 meas 145. 25mph max 47 meas 51 what could be the problem

Monday, February 11th, 2013 AT 3:51 PM

1 Answer

  • Tiny
  • Wrenchtech
  • Expert
  • 19,583 posts

HC is unburned fuel so you have to look for where it could be coming from. Simply changing the oil will sometimes help a lot but it usually comes down to incomplete combustion/misfire.

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Monday, February 11th, 2013 AT 3:57 PM

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