check engine light on 09 impala

2009 CHEVROLET IMPALA
40,000 MILES • 6 CYL • 2WD • AUTOMATIC
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HECTOR
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  • 1 POST
I have an 09 chevy impala with a check engine light on and a symbol that reads reduced engine power..put it on a reader and no codes were found...tightened gas cap, same results after about a day or two..car has about 40,000 miles oil changes on time..what can cause this problem??
Feb 15, 2011 at 8:51 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Will your code reader show all codes? I saw a service bulletin for P2138, has to do with water leak under the dash getting into wiring harness. If that code is applicable, fix the water leak. An example., maybe the seal around windshield has a leak.

There may be other possible reasons for reduced power. Without something to point us in the right direction, I don't know?
Feb 15, 2011 at 9:15 AM
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