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P0401 Diagnostic Trouble Code Discussion for February 2005

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2001 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCDT13W41
P0401: Insufficient EGR Flow Detected. ... first time, the P0401 code set before we did not even get out of town before the light reset. Pump & check valves ... and as per fix data base ... said it was done. Nearly half a tank of gas burned out proving that the light did not come back on. Bill...
February 02, 2005
1996 Dodge Grand Caravan SE 3.3L Stall, MIL Lamp on VIN: 2B4GP44RXT
P0401: EGR System Malfunction. ... has a P0401 code I cannot get rid of. Replaced exhaust tube, egr valve, solenoid and cleaned passages twice. There is vacum to the soleniod, 12v, and signal from computer. What am I missing? Now vehicale stalls intermittantly coming to a stop after all thi...
February 05, 2005
2001 Ford Ranger XL 4.0L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 1FTYR10E11
P0401: egr insufficient flow. Hi techs,this Ranger has a driveability issue(bad idle and surge at cruise speeds) with codes;po172 - po175 rich both banks. Also codes;po401 - po402 egr flow insufficient and egr flow excessive. I have install a new mass air flow,egr pressure sensor,2 oxygen ...
February 07, 2005
1996 Mercury Sable GS 3.0L MIL Lamp on VIN: 1MELM50U6T
P0401: EGR flow insufficient. Hello all. I replaced the engine in this car because water pump went and customer kept driving until it died. The first code to pop up was P0155 O2 sensor b2 s1 heater circuit malfunction. I swapped left & right sensors and get same code. This makes me thi...
February 10, 2005
1997 Lexus SC300 3.0L check engine light VIN: JT8CD32Z3V
P0401: EGR System Insufficient Flow Detected. the check engine light comes on after 2 drive cylces and then stays on. vehicle operation is fine. same code every time, po401. egr valve function appears to be normal.
February 24, 2005