Pontiac Bonneville Problem Report
Pontiac Bonneville Check Engine Light Due to Intake Manifold Vacuum Leaks
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.
The intake manifold gaskets can develop external engine oil or coolant leaks. The intake manifo...
The cam sensor interrupter (magnet) may become demagnetized and/or fall off of the camshaft gea...
I have a 2002 Pontiac bonnevile SLE and My check engine light is on for a P1404 code. One of th...
runs very well,but when you shut it of,theres a strong smell of gas,dont see any leaks ?
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.