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P0401 Diagnostic Trouble Code Discussion for May 2013

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2007 Chevrolet Silverado 2500 HD Classic LS 6.6L MIL Lamp on, Limp Mode VIN: 1GCHK23D87
P0401: EGR Flow Insufficient Detected. This truck throws a P0087 code and goes into limp mode, restricted to 40 MPH when the customer is hauling heavy loads in hot weather only. All winter long it was fine, it only fails on 75+ days after miles of driving. Balancing rates are Cyl 1 -3.2, Cyl 2 +1.3...
May 01, 2013
2002 Dodge Stratus SE 3.0L MIL Lamp on VIN: 4B3AG42HX2
P0401: EGR System Malfunction. ... trying to come about a vacuum time specification for the EGR system on this car. After thoroughly researching this EGR system, I have a full understanding on how the system is supposed to work. I understand that when the PCM requests the EGR on, it activat...
May 01, 2013
1996 Toyota Camry DX 2.2L MIL Lamp on VIN: 4T1BG12K8T
P0401: EGR System Insufficient Flow Detected. ... lost first version. 1996 Camry--tag team repairs (cust owns tire shop). Po401 code reoccurs fast. We diagnose egr funtional problems everyday-CA smog station. This one sure seems to work. Cust reluctantly installed a new Toyota EGR vsv solenoid per practic...
May 02, 2013
2000 Buick Park Avenue Ultra 3.8L MIL Lamp on VIN: 1G4CU5419Y
P0401: Insufficient EGR Flow Detected. Thanks in advance. This car came in for an intake gasket replacement (only leaking oil out of end rails). Repair went well, vehicle runs fine. Now I have an insufficient EGR flow code. You can watch mode 6 data climb every time an egr test is run until the num...
May 31, 2013