P0401 Diagnostic Trouble Code Discussion for November 2007
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 | |
| 2002 Mazda Tribute ES 3.0L MIL Lamp on VIN: 4F2YUO9132 P0401: isufficent egr flow. i have this tribute driving me crazy. i am getting mil light for the dpfe sensor.i scanned voltage and it is 1.01 volts,when you first start it. then it will go to 4.73-4.81 volts. checked harness from ecm to dpfe checks perfect.wiggled wires didn't change any... |
November 01, 2007 | |
| 1999 Toyota Camry LE 2.2L MIL Lamp on VIN: JT2BG28K8X P0401: EGR System Insufficient Flow Detected. ... DTC P0401 tested system everything tested good. No vacuum to EGR until after engine warmed up and off idle. EGR valve opens when reving engine. When appling vacuum to EGR valve at idle engine dies. EGR valve is fully open at 4" vacuum and does not blee... |
November 05, 2007 | |
| 2001 Acura MDX Touring 3.5L MIL Lamp on VIN: 2HNYD18861 P0401: EGR System Insufficient Flow Detected. Hello Acura techs, I have a resricted egr passage problem. If I energize the valve (open it)there is no idle speed change. What I need to know is where do they clog up? There is a housing on the rear of the engine that is host to the egr valve and thermostat h... |
November 19, 2007 | |
| 1999 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M3X P0401: Insufficient EGR Flow Detected. ... doesn't have any driveability issue other than the check engine light is on. the only code is the p0401 for insufficient egr flow. I can command the egr on with my scanner and the map voltage increases like it is supposed to. and it makes the engine stumbl... |
November 20, 2007 | |
| 1998 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M2W P0401: Insufficient EGR Flow Detected. Does anyone know the amount of vacuum change the PCM is looking for during the EGR test? |
November 28, 2007 | |
| 2003 Chevrolet Impala LS 3.8L Hesitation, lack of power VIN: 2G1WH52K13 P0401: Insufficient EGR Flow Detected. ... advice. I am the third tech to attemp repair on this vehicle and am stumped. Vehicle came in with a P0401 code and a lack of power. They replaced to EGR valve which cleared the code. When running at light throttle vehicle run... |
November 30, 2007 |
