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P0401 Diagnostic Trouble Code Discussion for September 2009

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2003 Mitsubishi Montero Sport XLS 3.5L MIL Lamp on VIN: JA4MT31R33
P0401: Insufficient EGR Flow Detected. the code of p0401 will set as a pending code in one drive cycle and ecm will turn the ses light on during the second drive cycle.all published test that i have found alldata,identifix,mitchell the system has passed. a question i have and have not been able to ...
September 01, 2009
2002 Isuzu Trooper LS 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: JACDJ58X22
P0401: Insufficient EGR System Flow Detected. Hello my friends,I need to pick your brains again.Before I condemn the fuel pump as being weak i need to know what to check beforehand.According to the manual the fuel pressure should be between 48-55lbs.Now is that deadhead pressure or regulated pressure?It h...
September 10, 2009
1995 Mazda B3000 3.0L MIL Lamp on VIN: S4F4CR16U3
P0401: egr insufficient flow. Hey everyone, got this code set p0401 egr insufficient flow. egr valve works normal, vacuum pump opens valve and holds. control solenoid is new. dont know how the egr system monitors the insufficient flow.. any common issues? the egr monitor takes forever to c...
September 14, 2009
1998 Ford Ranger XL 2.5L MIL Lamp on VIN: 1FTYR10C4W
P0401: egr flow. help good running truck. customer came in mil on code po401. should have been easy replace dpfe sensor. light off for 1 day. came back and we found a broken wire at vacum solonoid and that solonoid did't work. replace both and my fault for not listening to tec...
September 21, 2009