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
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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