Chevrolet Impala Problems

RepairPal has identified the most common problems with the Chevrolet Impala as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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38
Known Problems

There have been multiple reports of the check engine light illuminating. While there is no one solution, many of the codes associated with the check engine light are from the evaporation emissions or EVAP system. This may be addressed by tightening the gas cap and performing the appropriate drive cycle that can be found in the owner's manual.

The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.

A Loose or worn gas cap may cause Check Engine Light to illuminate.

The high pressure power steering hose will commonly leak fluid; it should be replaced.

The automatic transmission shifter may fail, or a wire may break near the shifter causing the ignition key to become stuck in the ignition lock cylinder.

The engine may start and stall with the security light flashing. This is commonly caused by a failed passlock sensor which is part of the ignition lock cylinder. A secondary cause could be the ignition switch itself. Worn contacts inside the ignition switch can cause voltage drop issues which can affect the passlock system. Proper diagnoses should be performed before replacing any parts.

The mass air flow or crankshaft position sensor may fail causing the engine to intermittently stall. It may be necessary for the engine to cool down before it will restart.

Flex fuel vehicles can develop fuel calibration issues resulting in illumination of the Check Engine Light and/or lack of power. This commonly occurs if only short trips are taken after changing fuel type from E85 to gasoline or gasoline to E85. In most cases, the fuel calibrations can be reset for gasoline using a properly equipped scan tool.

The fuel pump may fail causing engine to stall and not restart.

The speedometer or other instrument panel gauge may begin to work erratically at times. Our technicians tell us that the instrument cluster must be sent to a repair facility to correct this fault.

The water pump may develop a coolant leak resulting in an engine overheating condition.

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.