1992 Mercury Marquis check engine

1992 MERCURY MARQUIS
81,000 MILES • V8 • 2WD • AUTOMATIC
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TONYHUNTIN
  • MEMBER
  • 1 POST
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
Jun 5, 2010 at 9:03 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 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
Jun 9, 2010 at 2:21 PM
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