You should have performed test to confirm what is wrong before starting to replace components. Replacing a component and hoping that it is at fault is rather costly and time consuming.
System is equipped wit self diagnostics and a scan might show some trouble codes that can assist in getting to the source of problem.
The chart shows troubleshooting procedures for the problem.
Images (Click to enlarge)
Saturday, January 8th, 2011 AT 7:04 PM