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1992 Mercury Marquis check engine

Tiny
TONYHUNTIN
  • MEMBER
  • 1992 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 81,000 MILES
Check engine light comes on and off while driving does not stay on comes on for few minutes then goes out . Does that for entire time driving. What should I replace. Code 136 oxygen sensor indicates running lean left side
Saturday, June 5th, 2010 AT 4:03 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
First, that doesn't mean the sensor is bad. It tells me it is working properly. I would recommend checking for vacuum leaks. If there is one, it will cause a lean mixture thus setting the code.

Let me know what you find.

Joe
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Wednesday, June 9th, 2010 AT 9:21 PM

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