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P0400 Diagnostic Trouble Code Discussion for October 2010

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1999 Chevrolet Tracker 2.0L MIL Lamp on VIN: 2CNBJ13C6X
P0400: egr. ... engine light on. Scanned ecm and found code P0400 in memory. This is an Egr flow code. Both 12v power supplys to Egr are good, the control ciruits work with the ECM - I tested with a labscope to check the voltage. I do not know exactly when the control cir...
October 29, 2010