Buick Regal Problems

RepairPal has identified the most common problems with the Buick Regal 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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48
Known Problems

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

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

The Engine Control Module (ECM) can fail causing stalling, and engine and transmission drivability concerns.

The display on the heater and AC control panel may become dim or go completely blank. Our technicians tell us the control panel must be replaced to correct this fault.

The upper intake manifold gasket and/or a PCV vacuum lines/hoses can develop vacuum leaks with age. This type of leak can result in a higher that normal or rough idle.

Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.

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

 

The catalytic converter may become plugged resulting in loss of engine power. General Motors has extended the catalytic convertor warranty on some models to 10 years or 120,000 miles. Please contact your local GM dealer to see if your vehicle is included.

A stalling issue may occur if the battery goes dead or is disconnected and the "idle learn" procedure is not performed. For more information on "relearning" the engine idle speed, please click here»

The exhaust gas recirculation (EGR) tube which connects the EGR valve to the intake manifold may develop an engine vacuum leak, causing the Check Engine Light to illuminate with code P0171 and/or P0174 stored.

The crankshaft position sensor, ignition module, and/or powertrain control module (PCM) may fail resulting in illumination of the Check Engine Light with ignition system related fault codes stored in the PCM. Patience is necessary when dealing with this specific situation as normal diagnostic procedures are not effective. In many cases, the best option is to replace parts, one at a time until the fault is corrected.

Acid may leak from the battery at the cable connections, resulting in corrosion on the battery cable ends and in the battery tray. A Leaking battery should be replaced and the cables thoroughly cleaned or replaced if necessary.

The intake manifold gasket may develop external engine oil leak. The manifold gasket will need to be replaced to correct this issue.

Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.
Our technicians highly recommend that the engine coolant be replaced every 30,000 miles.