Pontiac Problems

RepairPal has identified the most common problems with the Pontiac 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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Known Problems

The rear light socket plate may fail causing a brake light or other rear light to stop working.

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.

It is common for the fuel level sensor in the fuel tank read the fuel level incorrectly. The sensor must be replaced to correct the condition. Our technicians recommend having the complete fuel pump module replaced on high mileage vehicles.

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

The crankshaft position sensor may fail causing the engine to stall intermittently, the Check Engine Light may or may not illuminate.

The fuel injectors may short out electricity causing a rougher than normal idle.

The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine  with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.

The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.

The PCV vacuum hose under the upper intake plenum may become brittle and crack causing an engine vacuum leak.

You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be completely flushed.

Body: A dirty throttle body may cause a lower than normal engine idle resulting in a stalling condition. A stalling condition may also result if an idle learn procedure is not performed if the battery goes dead or is disconnected.

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

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

 

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

 

The intake manifold gaskets can develop external engine oil or coolant leaks. The intake manifold will need to be removed and the gaskets replaced to correct this issue. In some cases the plastic intake manifold my be damaged requiring replacement.