I have a 2006 chevy cobalt . The check engine light is usually on but this time it starting blinking I had a code search done on it . I got two different codes kw 20 and iso9141 can somebody tell wh

Asked by May 03, 2015 at 12:47 PM about the 2006 Chevrolet Cobalt LS

Question type: Maintenance & Repair

1 Answer

59,005

Those aren't good trouble code numbers. The check engine light is flashing to warn you that the engine is misfiring and damaging the catalytic converter. You should get a trouble code such as P0300 or P0301or P0302, etc. HTH. -Jim

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