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P0401 Diagnostic Trouble Code Discussion for December 2005

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2000 Ford Ranger XL 3.0L MIL Lamp on VIN: 1FTYR14V8Y
P0401: EGR Insufficient Flow. This Ranger came in with the usual Ford po401 EGR insufficient flow code. Replaced the DPFE sensor and the code came back the next day. Took off the throttle body and EGR valve and cleaned the passageway, it really wasn't dirty at all. The EGR valve seems to b...
December 03, 2005
1999 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V3X
P0401: EGR System Insufficient Flow Detected. we have verified the vacuum system is operational and the regulator and egr valve are new factory parts. we verified that the vsv solenoid is working. we used bi-direct comunication and requested vsv on and off. we verified the ecm commands vsv on wnen at oper...
December 07, 2005
1996 Honda Accord LX 2.2L No Start, Stall VIN: 1HGCD7130T
P0401: EGR System Insufficient Flow Detected. I own a used car lot and have my Ford Senior Master Tech background so these Honda's really are "foreign" to me! I purchased this Accord to resale. Had check engine lamp on (believe unrelated)-replaced busted fuel cap and repaired "holy" EGR va...
December 10, 2005
1996 Honda Accord LX 2.2L No Start, Stall VIN: 1HGCD7130T
P0401: EGR System Insufficient Flow Detected. I own a used car lot and have my Ford Senior Master Tech background so these Honda's really are "foreign" to me! I purchased this Accord to resale. Had check engine lamp on (believe unrelated)-replaced busted fuel cap and repaired "holy" EGR va...
December 16, 2005
2000 Ford E-250 Econoline 4.2L Hesitation, MIL Lamp on, bucks VIN: 1FTNE2420Y
P0401: egr flow insufficient. this van drives fine most of the time then it intermittently will buck really hard the mass airflow reading goes from 17gpm to 248gpm but only breifly then all is well for a little while the mass airflow meter has been replaced with a new motorcraft unit i kno...
December 21, 2005
2001 Hyundai Sonata 2.4L MIL Lamp on VIN: KMHWF25S11
P0401: EGR System - Insufficient Flow Detected. this is new customer to our shop, the car runs ok but she noticed the fuel mileage took a dive after the mil came on. scan test shows po401 egr flow insuficient. we have removed the valve and cleaned out the carbon in the opening (there was very little) our qu...
December 22, 2005
2000 Ford Ranger XL 3.0L MIL Lamp on VIN: 1FTYR14V8Y
P0401: EGR Insufficient Flow. This Ranger came in with the usual Ford po401 EGR insufficient flow code. Replaced the DPFE sensor and the code came back the next day. Took off the throttle body and EGR valve and cleaned the passageway, it really wasn't dirty at all. The EGR valve seems to b...
December 03, 2005
1999 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V3X
P0401: EGR System Insufficient Flow Detected. we have verified the vacuum system is operational and the regulator and egr valve are new factory parts. we verified that the vsv solenoid is working. we used bi-direct comunication and requested vsv on and off. we verified the ecm commands vsv on wnen at oper...
December 07, 2005
1996 Honda Accord LX 2.2L No Start, Stall VIN: 1HGCD7130T
P0401: EGR System Insufficient Flow Detected. I own a used car lot and have my Ford Senior Master Tech background so these Honda's really are "foreign" to me! I purchased this Accord to resale. Had check engine lamp on (believe unrelated)-replaced busted fuel cap and repaired "holy" EGR va...
December 10, 2005
1996 Honda Accord LX 2.2L No Start, Stall VIN: 1HGCD7130T
P0401: EGR System Insufficient Flow Detected. I own a used car lot and have my Ford Senior Master Tech background so these Honda's really are "foreign" to me! I purchased this Accord to resale. Had check engine lamp on (believe unrelated)-replaced busted fuel cap and repaired "holy" EGR va...
December 16, 2005
2000 Ford E-250 Econoline 4.2L Hesitation, MIL Lamp on, bucks VIN: 1FTNE2420Y
P0401: egr flow insufficient. this van drives fine most of the time then it intermittently will buck really hard the mass airflow reading goes from 17gpm to 248gpm but only breifly then all is well for a little while the mass airflow meter has been replaced with a new motorcraft unit i kno...
December 21, 2005
2001 Hyundai Sonata 2.4L MIL Lamp on VIN: KMHWF25S11
P0401: EGR System - Insufficient Flow Detected. this is new customer to our shop, the car runs ok but she noticed the fuel mileage took a dive after the mil came on. scan test shows po401 egr flow insuficient. we have removed the valve and cleaned out the carbon in the opening (there was very little) our qu...
December 22, 2005