You will have to scan your computer for fault codes. We recommend buying a code scanner that works just like your mechanics. The OBD II scanner will read the data stream from your trucks computer and give you all the trouble codes that are malfunctioning. You can look up the trouble codes here. After replacing all the sensors that have failed you can use the same scanner to clear the check engine light. Check the EGR valve, it may be hanging up. Also, check the fuel pressure regulator.
Thursday, October 14th, 2010 AT 9:02 PM