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-   SOHC - 2.3L & 2.5L Lima Engines (https://www.ranger-forums.com/sohc-2-3l-2-5l-lima-engines-135/)
-   -   CODE 401 for ever (https://www.ranger-forums.com/sohc-2-3l-2-5l-lima-engines-135/code-401-ever-103744/)

k00kiem0nster 03-17-2010 04:30 PM

CODE 401 for ever
Hello all, I have 1995 2.3 ranger and i have a CEL light on for about a year. got it read and code 401came up. they wanted to charge me 900.00 dollars to do all this that i have already done. Replaced egr and its sensor, cleaned egr tube with carb cleaner, ran seafoam, replaced hoses to sensor and nothing. Code keeps coming up. I have cleared the code by unplugging negative cable for hours. what can it be? I plan on removing upper intake and cleaning carbon buildup at port where it attaches to egr valve. but hesistant because of throttle cable. What do u all think?

Toreador4x4 03-17-2010 04:36 PM

i would say it is the DPFE (differential feedback pressure egr) sensor

k00kiem0nster 03-18-2010 12:05 PM

i have already replaced dpfe sensor. Should i return it to auto zone and get another? Someone told me it may be the o2 sensor or cat converter, but i told them code did not pop up for that. what u think?

Toreador4x4 03-18-2010 01:58 PM

i dont think the o2 sensor would throw a code for EGR

RodeoBum09 04-08-2010 01:50 AM


BlutoBodine 04-09-2010 11:03 AM

My dad's F150 originally had the aluminum DPFE sensor when it failed, and replacement was plastic. I went through about 6 different plastic DPFE sensors, from AZ to OEM, and they all failed within a few weeks or months. I finally went to a salvage and bought a USED aluminum sensor...and the code never returned.

k00kiem0nster 05-20-2010 01:23 PM

fixed code 401
Just to let you guys know with the same 401 code. it was my upper intake that was clogged with carbon. had a friend remove intake and clean it with carb cleaner. stuff was hard like a rock. so for future 401 codes be advised insufficent flow means it clogged and you have to remove the carbon buildup in the upper intake before you replace all that stuff that i did before. I passed emissions and did not have to pay precision tune the nine hundred dollars thay qouted me. yeeepeeeee!!!!

Inspector 05-21-2010 08:15 AM

Thanks for posting back your fix!

*A lot of people don't take the time

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