darn P0401 again

[Rons beast]

Darn, what a week I'm having! First my internet goes down, (using the neighbors network now) then that cel code 0401 pops up again. ( 96 fullsize w/5.0 auto and cold air intake.) I have cleaned the egr and verified it's working. I pulled off the throtlebody cleaned it and all the passages and ports, installed it with a new gasket, and all was good... for a few days. (the dpfe sensor is less than a year old) then I got the code again. Today I checked the sensor and it had water drops in it!!! Anybody else find this? I also hear a ticking timmed to the pulses in one of the hoses to the sensor. The ticking is comming from the back of the motor behind the manifold. (it's too packed and hidden for me to see more.)

Anybody got any ideas? I'm going on a 1500 mile trip and don't need the wife all tence and worried.

Thanks in advance.

 

[Eddiefishback]

I too have had this issue I just keep clearing the p401-402 codes for about a month ten had the egr sensor replaced for the second time seems to have done the job. Being the mechanic did the work he replaced the bad sensor for free. The original sensor lasted about maybe a year or close to it...Dunno maybe some crappy sensors out there or me running the truck in some high water at times. According to what I have read on the p401-402 you do NOT need to fix it right away but should within a week period. I have not noticed when running my truck with codes active any sort of change in engine performance nor any rich or lean smells from the exhaust. 96 bronco 351w motor. I am not a mechanic these where my experiences. Good Luck

 

[miesk5]

yo,

If it wasn't a Genuine Ford Motorcraft DPFE, get another via Amazon

$59.50 w/free S&H

http://www.amazon.com/gp/offer-listing/B001BS9K3I/ref=dp_olp_new?ie=UTF8&condition=new

Local deealers wanted 150 + sales tax here

Test it first, but some moisture isn't good altho some say it does not matter.

new Plastic replacement version is MOTORCRAFT Part #DPFE15

Testing in a 96 5.0; "...DPFE comes in as .15 VDC during KOEO test between REF & Ground. TOMCO says it should read 0.45 +/- 0.25 volts for the .55 volt for this original Aluminum type sensor My Ford PCED/EVTM is frozen, so I can't view Ford's +/- values. &, when pulling REF hose off, fine particles fell out of DPFE. So, figuring DPFE Sensor is bad according to Ref voltage and particles... Yes, your voltage of 0.15V on the DPFE line is a typical sign of a bad one. Try to obtain a Motorcraft replacement, as the retail part store pieces don't last..."

Source: by SigEpBlue (Steve) & miesk5

Testing & Vacuum/Voltage Parameters & pics on both older Aluminum & Newer Plastic Version; MIESK5 NOTE: only 95 5.8L California models & all 96 have the DPFE Sensor instead of EGR Valve Position Sensor (EVP); Ford also calls the DPFE Sensor an EGR Pressure Valve; my 96's Ford pn is F4ZZ9J460-B; new Plastic replacement version is MOTORCRAFT Part #DPFE15 Source: by tomco-inc.com

-

Ticking from behind manifold is prob a check valve that rusts out; mine was rusted badly and causing an exhaust leak type sound a few yrs ago; here it is in a diagram by Steve83; or air diverter valve.



for Ford PNs on any above get it in;

Vehicle Emission Control Information (VECI) Decal, Vacuum Diagrams & Calibration Parts List for 88 & UP. On-Line for Free at Ford. Click "Quick Guides" in left panel; Scroll to & CLICK VECI Labels "Provides Vehicle Emission Control Information (VECI) and a related calibration parts list." Enter applicable info (need to know your Calibration number from your B-pillar sticker). Vacuum Diagram is the same as the one on the core support or hood or air filter cover.

Source: by Ford @ http://www.motorcraftservice.com

an example of my 96.50 Parts List; CALIBRATION: 6-53E-R10:

SENSOR ASSY, Catalyst Exhaust Gas Oxygen Monitor- DOWNSTREAM F65F 9G444-CA F65Z 9G444-C

RESERVIOR ASSY, EGR Vacuum F4UE 9E453-CA F4UZ 9E453-C

CONTROL ASSY, EGR Vacuum Regulator FOTE 9J459-A1A FOTZ 9J459-A

SENSOR ASSY, EGR Pressure Valve F48E 9J460-BA, BB F4ZZ 9J460-B

VALVE ASSY, Thermactor Air Control Solenoid Vacuum E7TE 9H465-AA E7TZ 9H465-A

VALVE ASSY, Thermactor Air Control Solenoid Vacuum E7TE 9H465-BA E7TZ 9H465-B

SENSOR ASSY, Exhaust Gas Oxygen - UPSTREAM F68F 9F472-AA F68Z 9F472-A

VALVE ASSY, EGR F27E 9D475-A2B, A4B F2TZ 9D475-A

TUBE ASSY, EGR Valve to Exhaust Manifold F6TE 9D477-ED, EE F6TZ 9D477-E

PUMP ASSY, Thermactor E5TE 9A486-DB E5TZ 9A486-D

VALVE ASSY, Thermactor Check - Hose ****** One End-Press in Tube Other End - DOWNSTREAM E8DZ 9A487-A

VALVE ASSY, Thermactor Check - 3/4-14 Thread One End-Hose ****** One End - UPSTREAM E9VZ 9A487-A

VALVE ASSY, Thermactor Control E9AE 9F491-AA F0AZ 9F491-A

INJECTOR ASSY, Fuel F2TE 9F593-A3A F2TZ 9F593-A

VALVE ASSY, Throttle Air By-Pass F4TE 9F715-AA F4TZ 9F715-A

REGULATOR ASSY, Fuel Charging Pressure F4TE 9C968-BA F4TZ 9C968-B

POTENTIOMETER ASSY, Throttle Position Sensor F6TF 9B989-AA F6TZ 9B989-AA

DISTRIBUTOR ASSY F2TE 12127-BA F2TZ 12127-BA

SENSOR ASSY, Mass Airflow F5UF 12B579-BA F5UZ 12B579-BA

SENSOR ASSY, Engine Electronic Control Coolant Temperature F5AF 12A648-AA F5AZ 12A648-A

PROCESSOR AND CALIBRATOR ASSY, Powertrain Control Module - EEC-V - TYPE: ML1-442 - REPROGRAMMABLE F6TF 12A650-JD F6TZ 12A650-JD

SENSOR ASSY, Air Charge Temperature F5AF 12A697-AA F5AZ 12A697-A

 

[Rons beast]

Thanks for the info guys.

Replacing the sensor today, and the noise mysteriously has gone away just like it came!

I'll save your info,thanks again.