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spark plugs

  1. Problems, Driver Warnings or DTCs - Chevy Volt
    CEL Engine misfire,seems ok after spark plugs change,but still got a softer problem I have another thread of this issue but not many answers. I have a my12 Ampera with 84k km, I had once last year a CEL starting the car in winter at -15C and I guessed it was a bad fuel, clear the error in...