Cadillac Seville Problems
RepairPal has identified the most common problems with the Cadillac Seville based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
An intake manifold vacuum leak can develop from a variety of sources, often causing illumination of the Check Engine Light with codes P0171 & P0174 stored. Thorough diagnoses will be necessary to pinpoint the cause in order to make the correct repairs. A "smoke" machine is often used to isolate the cause of difficult to find vacuum leaks.
Excessive carbon build up in the engine combustion chambers may be the cause of a smog check failure due to excess NOx emissions. A "top engine" decoarbonization cleaning procedure will commonly correct this concern.
The rubber section of an automatic transmission cooler line may develop a fluid leak . In some cases the leaking section of hose can be replaced. In others, the complete cooler line must be replaced to correct this concern.
The air conditioning compressor may become noisy or develop a refrigeration leak, requiring replacement.
The anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.
Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.
A coolant leak may develop from the water pump. The engine may overheat as a result of the coolant loss. A leaking water pump should be replaced.
This powertrain control module (PCM) may develop a fault with its electrical ground location at the front of the engine block near the starter motor.