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P0400 Diagnostic Trouble Code Discussion for June 2009

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1996 Mitsubishi Mirage S 1.5L MIL Lamp on VIN: JA3AA11A7T
P0400: Exhaust Gas Recirculation System Flow Malfunction. ... technician. We installed the original EGR valve back on the engine that her friend replaced which had a temp sensor on it. Thats why it got flagged for tampering. But it had the P0400 code even with that valve on it. The exhaust manifold was replaced at th...
June 10, 2009
1996 Buick Roadmaster Collector's Edition 5.7L MIL Lamp on VIN: 1G4BT52P2T
P0400: EGR System Performance. ... in and asked us to replace his egr valve with a new valve he bought. replaced valve & customer came back next day with check engine light on for egr code (P0400). Now customer would like us to diagnose check engine light. performed mitchell diagnostic ...
June 16, 2009
1998 Mercedes-Benz C280 2.8L MIL Lamp on VIN: WDB2309G2X
P0400: EGR performance. ... here...got this 98 MB C280 stuck at our bay for too long. Originally came in with P0400 stored. We did take off the EGR piping and found it badly clogged. We soak it with carb cleaner overnight and tested it flow like new. We then also install a new EGR va...
June 19, 2009