On higher-mileage vehicles, engine oil leaks from the valve covers and front crankshaft seal are common.
1996 Plymouth Voyager Problem Reports
Most Reported 1996 Plymouth Voyager Problem Reports
A defective vehicle speed sensor can cause problems with the cruise control and speedometer operation, as well as erratic shifting. The connectors on the sensors are also susceptible to corrosion, which will create similar symptoms. Any of these problems can cause Check Engine Light illumination.
A bad ground on the left frame rail can cause intermittent operation of the radiator cooling fans or AC compressor.