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P0401 Diagnostic Trouble Code Discussion for March 2006

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1996 Toyota Tercel DX 1.5L MIL Lamp on VIN: JT2AC52L2T
P0401: EGR System Insufficient Flow Detected. This EGR code will appear in about 25 miles of driving, according to the customer. The EGR valve operates normally, manual opening of the valve will stall the engine, and all vacuum lines and the associated solenoid work properly. The MAP/ barometeric sensor a...
March 08, 2006
1997 Chevrolet Monte Carlo LS 3.1L MIL Lamp on VIN: 2G1WW12M4V
P0401: Insufficient EGR Flow Detected. i got a 1997 monte carlo with a mil on. checked exhaust for leaks and none were found visually checked egr valve,pintle,and passages no problem found.i can cammand the egr valve on and it works as designed. after replacement of egr valve and cleaning the passa...
March 21, 2006
1999 Ford Taurus SE 3.0L MIL Lamp on VIN: 1FAFP53S8X
P0401: egr flow problem. hello all, this beast came in 2/6/06 for p1406. performed testing to find dpfe sensor at fault. readings were good and did 10 mile roadtest with customer (he had to go). two weeks later light back on, same code. double checked everything, performed egr inducti...
March 21, 2006
1995 Toyota Tercel DX 1.5L MIL Lamp on VIN: JT2EL5SD3S
P0401: EGR insufficient flow. ... code P0401 EGR insuffiecient flow. Performed flow chart test and everything passed. Customer came back with MIL on again month later same code and transducer tested bad and we replaced the transducer. Customer has been back twice since then with MIL on and...
March 21, 2006
2002 Mitsubishi Eclipse GS 2.4L MIL Lamp on, po401 code returns VIN: 4A3AC44G22
P0401: Insufficient EGR Flow Detected. we have a mastertec scanner and cannot monitor any egr data in the obdii generic function, any experience or help would be greatley appreciated, with a fix for this problem.
March 22, 2006
1998 Ford E-250 Econoline 4.2L MIL Lamp on VIN: 1FTEPE2421
P0401: EGR flow insufficient. ... this one, came in with P0401 and P0402 stored. I did NOT clear codes, yet. Ran KOEO test, passed. Ran KOER test, it also passed. Although the rpm did not change as much as I'd have liked when the EGR was open. I manually opened the valve using a vacuum p...
March 28, 2006