Check Engine Light On


fairly significant
Typical Repair Cost:
Average Mileage:
115,500 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. not sure (1 reports)
  2. replaced oxygen sensor (1 reports)
2002 Pontiac Sunfire engine problems

engine problem

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2002 Pontiac Sunfire Owner Comments

problem #2

Sep 142011

Sunfire SE 2.2 L4 Dohc 16v

  • Automatic transmission
  • 101,000 miles


This check engine light has been lighting up the interior of the car for about a year now. Replaced the downstream O2 sensor only to find out that it was the upstream sensor that was bad. Of course the upstream is the hardest to get to. Then the proverbial "gas cap is not tight enough" happens often. When we fill up, it somehow creates a tank vacuum and it takes quite a few cranks to start the car back up. Once it starts and runs for a few minutes, its fine. But the CE light is still on. I tried the disconnect the negative battery terminal, reconnect to reset and drive continuously for 50 miles. It worked! The light went off............for about 3 days and then of course came back on again. With over 100,000 miles, I'm not sure it's worth the code scan. The day I fix that upstream O2 sensor, the timing belt will disintegrate. Always, always, always. Too bad too, cause it actally runs pretty good considering. At least for a Pontiac.

- , Orchard Park, NY, USA

problem #1

Mar 112007

(reported on)

Sunfire V4

  • Automatic transmission
  • 130,000 miles

I took it to my local garage and they ran the diagnostic and changed/fixed the "code" that was causing the problem... but it came on less than 15 miles later.... oh well!

- , New Smyrna Beach, FL, USA

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