Question about Chevrolet Cavalier

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I have a 2002 Chevy Cavalier. The engine light came on and it was the catilac convertor that needed to be replace. Mechanic completed the job and now the engine light is off. Took the car in for inspection and it failed because two sensors have not reset yet because of mileage. I drove the car over 150 miles and it will still not pass because of the 2 sensors. Chevy house said that the two sensors will not reset until it is about 74 degrees outside. I have never heard of this. Any idea of what or why?

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They are refering to the Drive Cycle not being completed. There are 7 monitors that have to complete in order for them to have a passing signal where the Smog Tech / Smog Machine can say its a pass in that part of the test.

This is what you need to do hope it helps out.

Cold Start

  • The barometric pressure (BARO) is more than 72 kPa .
  • The engine coolant temperature (ECT) is below (84°F ).
  • The intake air temperature (IAT) is below(84°F ).
  • The difference between the IAT and the ECT is(13°F ) or less.
  • The battery voltage is between 9.0-16.0 volts .
  • The fuel level is between 1/4 and 3/4.
The DRIVE CYCLE:

Inspection/Maintenance (I/M) Complete System Set Procedure - Steps 1-4 I have a 2002 Chevy - 155390324
Inspection/Maintenance (I/M) Complete System Set Procedure - Steps 5-7 159960079 READ THIS ALL THE WAY THROUGH 1ST BEFORE YOU ATTEMPT IT, SO YOU KNOW HOW TO START AND WHERE YOU NEED TO DRIVE THE CAR TO HAVE ALL THE MONITORS RESET.

If you have more questions let me know. Good Luck.

Posted on Aug 27, 2010

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  • Chevrolet Master
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O2 SENSORS COULD BE YOUR PROBLEM.IF THEY GO BAD THEY WILL CAUSE RICH EXHAUST EMISSIONS THAT WILL BURN OUT CATALYTIC CONVERTER ALSO CAUSE YOU TO FAIL STATE INSPECTION.

Posted on Aug 27, 2010

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