Quote:
Originally Posted by SoCal LS-L
Maybe ill try that too. I still dont understand how the ECU can detect a fault with the EGR valve itself. How can it know if the pintle is stuck open or closed without a sensor lead to the EGR? Knowing this will help me find the real problem with my low idle, as my only code is the 56.
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by vacuum or some other type of pressure i would think...