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P0401 Diagnostic Trouble Code Discussion for January 2006

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1999 Ford F-150 5.4L Surge, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on
P0401: insuff. EGR flow detected. NEW ENGINE was installed about 150,000 miles by someone else, brought to us with this problem. Component Parameters flow test failed, fuel tank pressure test failed, downstream hose disconnected failed.
January 02, 2006
1999 Ford F-150 5.4L Surge, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on
P0401: insuff. EGR flow detected. NEW ENGINE was installed about 150,000 miles by someone else, brought to us with this problem. Component Parameters flow test failed, fuel tank pressure test failed, downstream hose disconnected failed.
January 03, 2006
1995 Mercury Grand Marquis LS 4.6L Poor Fuel Economy, MIL Lamp on VIN: 2MELM75W2S
P0401: egr insufficient flow. ... plugging the EGR passages in the intake manafolds. Is this one of these problem engines? When this vehicle came in with the P0401 if I put vaccum to the EGR valve I could hear it open but no chage to the idle. I was advised to replace the EGR valve and cle...
January 04, 2006
2001 Ford Windstar 3.8L MIL Lamp on VIN: 2FMDA5142B
P0401: EGR flow insufficient. ... windstar that is coming in today with a P0401. The EGR valve itself will kill the engine with a hand held vacuum pump applied. Wish i had more info. Thanks!
January 05, 2006
2000 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V0Y
P0401: EGR System Insufficient Flow Detected. Car came in with P0401 code. The VSV is not working when I manually apply volrage and ground. The weird thing is when I command the ECM to turn on and off the VSV with my Snap On scanner the voltage only varies from 13.5v-11.9v. It doesnt seem to be fully grou...
January 12, 2006
1997 Honda Odyssey EX 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... Sorry I don't have the vehicle at my shop at this time to provide the VIN. This customer brought this vehicle in with complaint of check engine light on. Had a code P0401 for Insuffiecent EGR Flow. I checked the solenoid which operated flawlessly, I checke...
January 19, 2006
1999 Honda Passport EX 3.2L MIL Lamp on VIN: 4S6CM58W9X
P0401: Insufficient EGR System Flow Detected. ... Isuzu techs. This Vehicle has come back 2 or 3 times this winter with the P0401 code. It has a new egr valve, when we remove the valve to insect passages, etc. we find there is a lot of moisture accumulated in the egr valve & intake areas. We suspect t...
January 23, 2006
1997 Honda Odyssey EX 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... Sorry I don't have the vehicle at my shop at this time to provide the VIN. This customer brought this vehicle in with complaint of check engine light on. Had a code P0401 for Insuffiecent EGR Flow. I checked the solenoid which operated flawlessly, I checke...
January 24, 2006
1997 Acura RL 3.5L Misfire
P0401: EGR System Insufficient Flow Detected. Hello my name is patrick. I have a 1997 Acua 3.5RL THAT HAS A MISFIRE IN #1 CYL ONLY WHEN THE A/C OR HEATER IS ON THE PLUG,COIL,INJECTOR ALL WERE REPLACED CAN ANYONE HELP
January 27, 2006
2000 Honda Passport EX 3.2L MIL Lamp on, Idle only VIN: 4S6CK58W8Y
P0401: Insufficient EGR System Flow Detected. ... light was on. Codes that I got were P0401 (fixed already) and the other one was p1290 Electronic Throttle Controll Forced Idle Mode. There is nothing in Mitchell but basic testing. I checked the throttle pedal values with sc...
January 31, 2006
1996 Toyota Camry DX 2.2L MIL Lamp on VIN: 4T1BG12K9T
P0401: EGR System Insufficient Flow Detected. i'm pulling out my hair with this auto , egr valve will not open under highway test drive , i checked all components in the system it has the low vac signal & if i drive in second gear (about 3000 rpm )egr opens (about 10 in hg) or drive 80 mph on highway ...
January 31, 2006
1999 Ford F-150 5.4L Surge, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on
P0401: insuff. EGR flow detected. NEW ENGINE was installed about 150,000 miles by someone else, brought to us with this problem. Component Parameters flow test failed, fuel tank pressure test failed, downstream hose disconnected failed.
January 02, 2006
1999 Ford F-150 5.4L Surge, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on
P0401: insuff. EGR flow detected. NEW ENGINE was installed about 150,000 miles by someone else, brought to us with this problem. Component Parameters flow test failed, fuel tank pressure test failed, downstream hose disconnected failed.
January 03, 2006
1995 Mercury Grand Marquis LS 4.6L Poor Fuel Economy, MIL Lamp on VIN: 2MELM75W2S
P0401: egr insufficient flow. ... plugging the EGR passages in the intake manafolds. Is this one of these problem engines? When this vehicle came in with the P0401 if I put vaccum to the EGR valve I could hear it open but no chage to the idle. I was advised to replace the EGR valve and cle...
January 04, 2006
2001 Ford Windstar 3.8L MIL Lamp on VIN: 2FMDA5142B
P0401: EGR flow insufficient. ... windstar that is coming in today with a P0401. The EGR valve itself will kill the engine with a hand held vacuum pump applied. Wish i had more info. Thanks!
January 05, 2006
2000 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V0Y
P0401: EGR System Insufficient Flow Detected. Car came in with P0401 code. The VSV is not working when I manually apply volrage and ground. The weird thing is when I command the ECM to turn on and off the VSV with my Snap On scanner the voltage only varies from 13.5v-11.9v. It doesnt seem to be fully grou...
January 12, 2006
1997 Honda Odyssey EX 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... Sorry I don't have the vehicle at my shop at this time to provide the VIN. This customer brought this vehicle in with complaint of check engine light on. Had a code P0401 for Insuffiecent EGR Flow. I checked the solenoid which operated flawlessly, I checke...
January 19, 2006
1999 Honda Passport EX 3.2L MIL Lamp on VIN: 4S6CM58W9X
P0401: Insufficient EGR System Flow Detected. ... Isuzu techs. This Vehicle has come back 2 or 3 times this winter with the P0401 code. It has a new egr valve, when we remove the valve to insect passages, etc. we find there is a lot of moisture accumulated in the egr valve & intake areas. We suspect t...
January 23, 2006
1997 Honda Odyssey EX 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... Sorry I don't have the vehicle at my shop at this time to provide the VIN. This customer brought this vehicle in with complaint of check engine light on. Had a code P0401 for Insuffiecent EGR Flow. I checked the solenoid which operated flawlessly, I checke...
January 24, 2006
1997 Acura RL 3.5L Misfire
P0401: EGR System Insufficient Flow Detected. Hello my name is patrick. I have a 1997 Acua 3.5RL THAT HAS A MISFIRE IN #1 CYL ONLY WHEN THE A/C OR HEATER IS ON THE PLUG,COIL,INJECTOR ALL WERE REPLACED CAN ANYONE HELP
January 27, 2006
2000 Honda Passport EX 3.2L MIL Lamp on, Idle only VIN: 4S6CK58W8Y
P0401: Insufficient EGR System Flow Detected. ... light was on. Codes that I got were P0401 (fixed already) and the other one was p1290 Electronic Throttle Controll Forced Idle Mode. There is nothing in Mitchell but basic testing. I checked the throttle pedal values with sc...
January 31, 2006
1996 Toyota Camry DX 2.2L MIL Lamp on VIN: 4T1BG12K9T
P0401: EGR System Insufficient Flow Detected. i'm pulling out my hair with this auto , egr valve will not open under highway test drive , i checked all components in the system it has the low vac signal & if i drive in second gear (about 3000 rpm )egr opens (about 10 in hg) or drive 80 mph on highway ...
January 31, 2006