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P0400 Diagnostic Trouble Code Discussion for July 2005

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1996 Suzuki Esteem GL 1.6L MIL Lamp on VIN: JS2GB31S7V
P0400: EGR System Fault Too Much Or Too EGR Little Flow). having a problem fixing egr system, egr was plugged so we cleaned completely. test drove vehicle and mil came on again. tested solenoids and the one next to the dist. has power and ground at idle and just off idle ground would go away like it supposed to. then...
July 01, 2005
1997 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA21D7V
P0400: EGR System Recirculation Flow. ... DTC...found P0400 (EGR flow insufficient) and P0325(knock sensor). Inspected vacuum lines, found no leak. Applied vacuum directly to EGR valve at idle, but RPM only dropped about 100 rpm. I expected the engine to stumble and die. R...
July 02, 2005
1996 Kia Sephia GS 1.8L Poor Idle Quality VIN: KNAFA1252T
P0400: Insufficient EGR System Flow Detected. ... and idling poor with AC on. In this state, car can have no codes and MIL must light KOEO. MIL did not light. Found a problem with broken wire near ECM and this got the MIL to light. P0170 fuel trim code probably caused by d...
July 06, 2005