Join Now
International Automotive Technicians Network

P0401 Diagnostic Trouble Code Discussion for May 2010

Insufficient EGR Flow Detected


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2001 Dodge Stratus R/T 3.0L MIL Lamp on VIN: 4B3AG42H01
P0401: EGR System Malfunction. Hello all. This one is driving me crazy. This car comes in yearly for the PA state inspection and emissions test. Every year I pull the same codes (fourth year now). the guy is only worried about passing the inspection so he only shoots for the $150.00 waiver ...
May 06, 2010
2004 Mitsubishi Galant ES 2.4L MIL Lamp on VIN: 4A3AB36F14
P0401: Insufficient EGR Flow Detected. Customer has been chasing this code for a while and replaced the egr valve. Supposedly after the valve was changed the light stayed off for a month or so. If I reset The computer and drive for 20 minutes The EGR monitor will pass no codes, by 30 minutes of dri...
May 10, 2010
1996 Oldsmobile Cutlass Ciera 3.1L MIL Lamp on VIN: 1G3AJ55M7T
P0401: Insufficient EGR Flow Detected. Thanks in advance for any help with this car. Have scoured the archives and can't seem to find a similar situation. The thing that is puzzling me is the readings on my 2 different scanners for the MAP voltage. Is this normal or is the computer equating the lo...
May 10, 2010
2001 Mazda Tribute DX 2.0L No Start VIN: 4F2CU06B91
P0401: EGR flow insufficient. Wondering if anyone has run into this. Engine will start very briefly (like when firing on fumes), then just crank. Noid light starts out flashing normally (brightly), and I guess that's why it starts. But over the next several seconds of cranking, the noid li...
May 11, 2010
2001 Dodge Stratus R/T 3.0L MIL Lamp on VIN: 4B3AG42H01
P0401: EGR System Malfunction. Hello all. This one is driving me crazy. This car comes in yearly for the PA state inspection and emissions test. Every year I pull the same codes (fourth year now). the guy is only worried about passing the inspection so he only shoots for the $150.00 waiver ...
May 06, 2010
2004 Mitsubishi Galant ES 2.4L MIL Lamp on VIN: 4A3AB36F14
P0401: Insufficient EGR Flow Detected. Customer has been chasing this code for a while and replaced the egr valve. Supposedly after the valve was changed the light stayed off for a month or so. If I reset The computer and drive for 20 minutes The EGR monitor will pass no codes, by 30 minutes of dri...
May 10, 2010
1996 Oldsmobile Cutlass Ciera 3.1L MIL Lamp on VIN: 1G3AJ55M7T
P0401: Insufficient EGR Flow Detected. Thanks in advance for any help with this car. Have scoured the archives and can't seem to find a similar situation. The thing that is puzzling me is the readings on my 2 different scanners for the MAP voltage. Is this normal or is the computer equating the lo...
May 10, 2010
2001 Mazda Tribute DX 2.0L No Start VIN: 4F2CU06B91
P0401: EGR flow insufficient. Wondering if anyone has run into this. Engine will start very briefly (like when firing on fumes), then just crank. Noid light starts out flashing normally (brightly), and I guess that's why it starts. But over the next several seconds of cranking, the noid li...
May 11, 2010