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Newest reported 2003 Pontiac Sunfire problems

Check Engine Light Due to Gas Cap Issue

for the Pontiac Sunfire

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

19 Reports

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Check Engine Light Due to Engine Misfire

for the Pontiac Sunfire

The ignition module or an ignition coil may fail causing an engine misfire, the Check Engine Light may or may not illuminate. Diagnoses will be required to determine the cause and needed repair.

8 Reports

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Serpentine Belt Tensioner May Fail

for the Pontiac Sunfire

The serpentine belt tensioner can fail; it may become noisy and/or the belt may jump off. Replacement of the failed tensioner will be necessary.

15 Reports

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Rough Running Engine Due to Vacuum Leak

for the Pontiac Sunfire

The engine vacuum hose to the MAP sensor may crack resulting in a vacuum leak causing the engine to run rough and/or stall.

3 Reports

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Front Brake Rotor Wear Can Cause Pulsations

for the Pontiac Sunfire

Front brake rotors can wear causing a pulsation felt in the brake pedal. Our technicians often recommend replacement of the front rotors and brake pads as the best option to correct this condition.

20 Reports

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Transmission Fluid Leak From Cooler Line

for the Pontiac Sunfire

An automatic transmission fluid leak may develop from the rubber section of a transmission cooler line. In some cases the rubber section of hose can be replaced. In others, the complete cooler line must be replaced to correct this type of leak.

18 Reports

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The Fuel Pump May Fail Causing the Engine to Stall or Crank Over But Not Start

for the Pontiac Sunfire

The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.

6 Reports

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Power Window Not Working Due to Window Motor

for the Pontiac Sunfire

A door window may move slowly or stop in mid travel due to a failing power window motor. The affected window may start working again after the motor cools off. Replacing the faulty window motor will commonly correct this concern.

27 Reports

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