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P0401 Diagnostic Trouble Code Discussion for May 2008

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2004 Ford F-350 Super Duty XL 6.0L MIL Lamp on, VIN: 1FTSW31PX4
P0401: Insufficient EGR Flow Detected. ... side, originally had a coolant leak coming from under intake found it was the egr cooler an also had a hard start issue rough running cold then would clear up once warm, reflashed pcm with latest updates on ids, and replaced the egr cooler for the coolant ...
May 02, 2008
2003 Volkswagen Jetta TDI 1.9L MIL Lamp on
P0401: low egr flow. ... with a code p0401 for a low egr flow. We checked all lines from the vacuum pump to the egr solenoid. Vacuum to the solenoid is within specs. We removed the throttle body and cleaned the valve which was stuck. we also cleaned the intake as best possible wit...
May 20, 2008
1998 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1945W
P0401: Insufficient EGR Flow Detected. am chasing a p0401 egr flow code, sopposed to have new head, have checked egr with scanner, commanding 100% egr will make engine stumble but not die, ports look clean but it has that plate that bolts to back of head and can't get to it to check ports, pull egr...
May 22, 2008