Check engine light on, car running rough; running fine today. Concern?
Following a trip to the store in wet weather, my check engine light came on, and the car ran really rough on the way home. The owner's manual suggested it could be wet electrical system. After sitting overnight (14 hours, and nice weather), the car runs fine, but the check engine light is still on. Should I be concerned?
Yes, have it scanned for DTC codes stored on the computer.
Sounds like you need a tune up. Usually when a vehicle becomes susceptible to moisture it's an ignition problem. If you have over 100,000 miles on your Impala you're due for a tune up. HTH. -Jim
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