Car problem reports
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Most reported 2004 Chevrolet Aveo problems
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
The turn signal switch may fail causing the turn signals to stop working.
The speedometer may stop functioning with code P0722 stored in the powertrain control module (PCM). This may be caused by a worn speedometer gear due to coolant contamination of the transmission fluid. If contamination is found the radiator is most likely at fault. The transmission should also be thoroughly inspected and repaired or replaced as required.
One or both rear wheel bearings may develop an abnormal noise and require replacement.