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P0400 Diagnostic Trouble Code Discussion for September 2012

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1996 Hyundai Sonata GLS 3.0L MIL Lamp on VIN: KMHCF34T7T
P0400: EGR System Flow Detected. vehicle came in with code p0400 egr system malfunction. found someone had blocked vacuum line that supplies manifold vacuum to egr solenoid, repaired restriction and now it had vacuum supplied to egr thru the solenoid at all times, needless to say, ran terribl...
September 20, 2012
2002 Jaguar XKR 4.0L Misfire, MIL Lamp on VIN: SAJDA42B62
P0400: EGR malfunction. ... for state inspection. Found 4 not not ready codes(cat,egr,evap,o2).Mil turned on after about 50 miles P0455. Smoke tested system and found bad purge solenoid. Replaced solenoid took for test drive. after about 20 miles Codes P0171, p0174 came up. After che...
September 28, 2012