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P0401 Diagnostic Trouble Code Discussion for January 2009

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1996 Lexus ES300 3.0L MIL Lamp on VIN: 3T8BF12G3T
P0401: EGR System Insufficient Flow Detected. Lexus/Toyota Technicians. I have a 1996 Lexus ES300 that we cannot get the mil light off. The car came in on 12/22/08 for the mil light on. The technician found code po401 EGR flow insufficient detected. We replaced the EGR Valve pressure valve and cleared the...
January 07, 2009
1998 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K1W
P0401: EGR System Insufficient Flow Detected. ... 2 weeks ago with code P0401, the first thing I did was check to see if the engine would stall if vacuum was applied to EGR valve, it did, then I ran the car on the lift with a vacuum guage "t'd" into the vacuum line at 2500 I had about 7" of va...
January 09, 2009
1996 Toyota Corolla DX 1.8L MIL Lamp on VIN: 1NXBBD2E0T
P0401: egr low. The PCM will have commaned EGR on at normal load on light acceleration, then after a few seconds of steady "on" the PCM ground will toggle on & off for a few seconds, then steady on again, then the on & off routine repeats. I've driven the vehi...
January 16, 2009