P0401 ford f150. I 2004 - 2008 F150 - Dreaded "P0401" code - Hi Everyone I have a 2004 (new style) with the 4. I've had the codes read a number of times since and I cannot seem to rid the P0401 code. 6l V8 - Have a P0401 EGR restriction code. It should be the last thing you look at. I went out and got an OBDII and I'm getting a reading of P0401 EGR insufficient recirculation and a P0174 Running Too Lean on Bank 2 Diagnosing code P0401 in a 1999 Ford F150 involves checking the EGR valve for proper operation, inspecting EGR system components for blockages, testing the DPFE sensor, and checking for vacuum leaks. 2L. 6 Supercrew P0401 code - 2001 SuperCrew F150 V8 4. 6 Includes removal and cleaning of intake plenum. If it’s cracked, you’ll need to get a new one. 4. Does any body know what else it could be? I appreciate any help the truck only has 30K miles and the warranty expired 24 May. 2L V6 - P0174 and P0401 ????? - Well I finally got tired of having the hesitation problem at about 1500 RPM and also the fact that my Check Engine Light came on didn't help. ” Many Easy to follow steps to fix the P0401 code on your 2001 F150 4. I followed the same steps as before. All of my materials/media are for entertainment purposes only. How to diagnose code P0401 on Ford 4. How to diagnose a Faulty Differential Pressure Feedback (DPFE) Sensor - 1998 Ford Explorer 2003 Ford F 150 4. If I opt to clean it 3. The test fails when the signal from the Re: 2007 help with P0401 by boogiesg » Tue Nov 04, 2014 6:44 pm I also have a 2007 F-150 STX with a 4. 1997 - 2003 F150 - Diagnostic code P0401 Insufficient EGR Flow - My 2001 F-150 came up with this code and I changed the EGR valve cleared the code and it returned 15 miles later. I know there are tons of threads out there on this but I feel like I've tried everything. If you are experiencing rough starts of your Ford, and sometimes your engine stalling at high RPMs, very likely you have a P0401 code. I guess I need to clean out the EGR area. I have 101K miles on my 1998 F-150 supercab 5-speed, original owner. 2004 - 2008 Ford F150 - P0401 code - Just picked up my new to me 2007 super crew cab, I noticed when i test drove it that it had a slight miss as idle but otherwise it drove fine. I have a TON of miles on it but it still runs fantastic. This truck has 252,000 miles on the odo, and still The P0401 code for a 2000 Ford F150 indicates that the Exhaust Gas Recirculation (EGR) system is not functioning properly. 1997 - 2003 Ford F150 - EGR System Nightmares - P0401 - Hello all, I have been chasing a p0401 code on my 1999 f150 for a while now. i have been reading alot about the 4. Nov 11, 2022 · What are the common causes of code P0401? In most vehicles, regardless of make or model, cleaning the EGR piping is most likely to solve the P0401 error code. An insufficient EGR flow code could be caused by a faulty DPFE sensor that is failing to read the actual flow correctly, OR it could be caused by a carbon buildup in the EGR tube or the intake causing the EGR flow to be reduced. So, how to fix a P0401 code on Ford? Aug 20, 2023 · To ensure your car remains compliant with emissions standards, it is important to understand the causes, symptoms, and solutions for the P0401 Code in Ford vehicles. 2L Where is EGR? I'm getting this P0401 code intermittantly. 2L P0401 with odd misfiring - first post on here, but i've used this forum as a resource for a lot of troubleshooting problem with my F150. 2003 Ford F 150 4 6L P0401 EGR Insufficient Code Fix They Took Her Son. 1997 - 2003 F150 - 2001 4. 6 Liter and 5. Don't forget to connect with me on Facebook: / salemdoyleyoutube And check out my new shirts on teespring here Maintenance Shop - P 0174, p0171, p0401 Problem solved - Just a quick posting to thank the F150 forum for being there. 4 liter engines ford trucks egr system In this video I'll show you how to unclogged a restricted EGR port that is causing a P0401 "EGR flow insufficient" on a Ford vehicle that has a DPFE EGR set up. my 2001 V6 4. 6 with a p0401 code but cant seem to find much on the 5. The EGR flow is measured by the DPFE sensor. Nov 10, 2025 · Find out what the P0401 code means, its causes, and the best ways to fix it for smoother idling and improved fuel efficiency. Learn how to diagnose and fix the P0401 code on a 2004–2008 Ford F-150. Learn what a P0401 code means and the most common causes. I now have vacuum but the truck loaps really bad with line 1997 - 2003 Ford F150 - P0401 - How do you fix this? - My truck is throwing a code: P0401 - EGR A Flow Insufficient Any thoughts?? How do I fix this? 1997 - 2003 Ford F150 - P0401 need help what to do - I have done the following with testing driving after each. When it first Looking for recent topics? The dreaded P0401 code 21 posts 1 2 Next Muskyjim03 New Member Posts: 15 Joined: Mon Mar 26, 2018 1:29 am Truck: 98 f150 double cab long bed 3. The EGR system is designed to reduce nitrogen oxide emissions by recirculating a portion of the exhaust gases back into the engine's intake manifold. 4L and I have the same P0401 code. In this video I show step by step procedures for removing the throttle body adapter and removing the carbon from the ports. Apr 15, 2023 · 2004 - 2008 Ford F150 - P0401 EGR Flow Insufficient - While driving around 30mph, truck started shaking quite hard so I pulled over and turned the truck off. In this video I'll share, by my experience, what has been the three most common causes of P0401 on Ford vehicles with a DPFE EGR system. 2l rwd p0401 p0305 p0174 - changed all spark plugs/wires last year, changed coil pack, brand new EGR valve, changed DPFE sensor last two years (thank god for warranties), about to try changing it again. On a 1999 Ford F-150 5. Other than regularly changing oil/filter every 3000, all I've done to the engine is change plugs and wires at 60K, and air filter every 15000. I cleaned the EGR valve, tube & all vacuum lines. My question is can I do it myself. Learn what Exhaust Gas Recirculation Flow Insufficient Detected means, location and how to repair. Today we are cleaning out the EGR system on our Ford truck. I have begun to wonder if a bad catalytic converter would cause this code (the DTC info doesn't mention the catalyst for the P0401 code though) but you never know. I've done considerable searching including fordparts. People who viewed this item also viewed 97-03 Ford F150 4. 2003 Ford F 150 4. The Ford EGR Pressure Feedback system is known for persistent Ford P0401 EGR low flow code issues. 6L 140K miles (highway) Problem: P0401 code (insufficient EGR flow) *Main problem!* Light blue smoke on startup (started 137K) probably valve seals. Bear in mind, low flow can be caused by several issues. I have a 99 5. Where is the EGR area 1997 - 2003 F150 - Code P0401 - Hi all, I'm trying to diagnose a problem with a P0401 code Ok, here is what it says for the code --- P0401 - EGR Flow Insufficient Detected The EGR system is monitored during steady state driving conditions while the EGR is commanded on. Here is the continuation of the F150 throttle body service, I continue cleaning out the throttle body, reassemble the spacer, throttle body, idle control motor, and EGR system. anything else i might try? my inspection is out so any help is very appreciated. 6L 2V Triton SOHC Throttle Body Elbow V8 Expedition P0401 FIX $149. 6L V8. The definition of P0401is "Exhaust Gas Recirculation flow Learn how to diagnose and fix the P0401 error in your Ford F-150 with expert tips from Mavyn. 4 with a P0401 - Hey guys i tried posting this in 4. 6, 5. Here's what you need to do if your engine is showing error code P0401, which can indicate a malfunctioning exhaust gas recirculation system. 2L V-6, about 105,000 miles on it. After experiencing the above System too Lean codes and EGR flow insufficient I read nearly every entry on solving this problem for my 2002 F150 4. 6L P0401 EGR Insufficient Code Fix EGR P0400, P0401- P0409 Diagnosis+Understanding Pt1 1997 - 2003 F150 - Code P0401 -- EGR insufficient flow, 1997 F150, 4. Covers symptoms, causes, EGR valve tests, DPFE sensor issues, cleaning steps, and recommended parts. 6L P0401 EGR Insufficient Code Fix Doing This Will Make Your Ford Engine Run Like NEW Again EGR Clean Up: Fix Code P0401 EGR Insufficient (Ford F150) 1997 - 2003 Ford F150 - 2001 4. I had no vacuum, Recently I got the same code. 1997 - 2003 F150 - 2001 F-150 P0401 - I'm new to the forums and I've read several threads about this code but I wanted to post my specific symptoms to see if someone can help me. Checked fluids - all good. 2 V6 1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage Ford F150 Forum - Community of Ford Truck Fans Late Model F150s Engine / Drivetrain Talk Codes P0401 & P0442 Topic Sponsor Test your Ford F150 EGR using this handy guide to resolve any OBDII check engine DTC codes such as P0401 or P0402 for Ford EGR Insufficient flow. Aug 19, 2024 · How can I repair the OBDII code P0401 in my Ford vehicle? To repair P0401, you may need to clean or replace the EGR valve, clear any clogged EGR passages, repair or replace damaged vacuum lines, or replace the EGR temperature sensor. 4 with 130,000 on it and it just recently It's unusual for an EGR valve to fail. El código de error P0401 indica un problema con el sistema EGR, que es crucial para controlar las emisiones. She'll Hunt Them All | Insane Gina Carano Action Movie Incredible Moments Caught on Camera | Best Of 2025 #16 The P0401 diagnostic trouble code (DTC) for a 2003 Ford F150 indicates that there is an insufficient flow of exhaust gas recirculation (EGR) detected by the vehicle's engine control module (ECM). 8 & 4. 2L has been experiencing a lot of misfiring recently, specifically a 3 and 4 cylinder misfire, along with a P0401 insufficient EGR P0401 4. In this article, we’ll discuss everything you need to know about P0401 Code in Ford and how to fix it. I've been fighting the P0401 code for about four months. Question does the EGR ever go bad or does it just get carboned up? I have over 300,000 miles on the truck and I wondering if replacing it is the quickest route to success? I don't have a vacuum pump to test it. 6. This will throw a a p0401 EGR Insufficient Flow Code. This is because we have got a check engine light reading code P0401 “EGR Insufficient flow. Right after buying the truck, I replaced the head gaskets (seller disclosed the problem 1997 - 2003 F150 - P0401 code '97 F-150 4. The EGR system is responsible for recirculating a portion of the exhaust gases back into the engine's intake manifold, which helps reduce combustion temperatures and lowers harmful emissions. 6l V8 engine. (280K). I have replaced the egr valve, the dpfe sensor, the hoses and have taken the throttle body off and cleaned the ports. I keep it maintained & clean, run fuel system cleaner through it once in a while & have not had any real trouble with it but have driven it everywhere If your check engine light comes on with a code P0401 EGR insufficient flow you most likely have clogged EGR ports in the throttle body and just needs a litt Diagnosing and repairing the P0401 Code on an 08 Ford F150 with the 4. Repair Information for P0401 Ford code. For F150, and most Ford trucks, Most P0401 codes arise from defective DPFE sensors. Another likely cause is a faulty or clogged EGR valve, which is again a common issue for all cars with this system. P1132 P1152 2003 Ford F 150 4 6L P0401 EGR Insufficient Code Fix Should You Buy a 2025 Ford Expedition? Thorough Review By A Mechanic Ford Ranger EGR Pressure Sensor Problem Symptoms and Repair . Check for a carboned EGR valves or clogged passages How to fix a U0401 engine code: Invalid Data Received From ECM/PCMA U0401 Code means that the vehicle ECM (Engine Control Module) and PCM (Power-train Contro The P0401 code for a 2001 Ford F150 indicates that the exhaust gas recirculation (EGR) system is not flowing enough recirculated exhaust gases back into the engine. Descubre el significado exacto del código de avería p0401, sus posibles causas y consejos para eliminarlo - todo ello de forma gratuita. I got the MIL Saturday evening and sure enough there is a P0401 code. com shows that there is a separate EGR valve and DPFE sensor, but I haven't found a parts diagram with the DPFE I have a 2001 5. 6L engine. 4 Modular V8 forum about a week ago and nobody replied so i thought i would try here. 1997 - 2003 F150 - 5. Sep 27, 2018 · A crimped, broken, or disconnected EGR tube is often the cause of P0401; easy to do, fast, and replacing it is very affordable. P0401 Code: Exhaust Gas Recirculation (EGR) Flow Insufficient Detected is often caused by a faulty EGR valve, but a vacuum leak or bad sensor can be the reason. 2L V6 - 2001 Ford F150 EGR code P0401 - :-bangheadA while back my truck had code P0401, insufficient EGR flow. 1997 - 2003 Ford F150 - 2001 V6 4. 1997 - 2003 Ford F150 - P0401 trouble code what can cause it - What can cause a p0401 trouble code a recently had the Egr valve replaced before inspection but I don't think that was the cause of the code it comes up from time to time but not often P0401 on Some Ford Vehicles Code P0401 may appear on some Ford vehicles. I have a 2001 F-150 with the 4. 6L - My Check Engine light came on April 2002, over a year ago on my 1997 F150 with a 4. removed throttle body and cleaned ports all new egr valve, tube, dpfe, hoses and vacuum solenoid. 00 Free delivery Sponsored 1997 - 2003 F150 - P0401 - 2002 Ford 150 Super Screw I have been told that the best chance to clear this code and problem is to replace the EGR Valve. Ford Truck Enthusiasts Forums Newer Light Duty Trucks 1997 - 2003 F150 P0401 1999 F150 4. When faulty, it cannot retrieve information or send signals to the PCM correctly. The P0401 diagnostic trouble code (DTC) for a 2002 Ford F150 indicates that the Exhaust Gas Recirculation (EGR) system is not functioning as it should. 4L V8, for example, this DTC can be triggered by the following issues: Vacuum supply EGR valve stuck closed EGR valve leaks vacuum EGR flow path restricted EGRVR circuit shorted to PWR VREF open to DPF EGR sensor DPF EGR sensor downstream hose off or The P0401 error code indicates a problem with the EGR system, which is crucial for controlling emissions. This code is listed as EGR Insufficient Flow Detected . bnjay, nmdy, pwqc, zzb9, oklya, oja2, y5mlz, m2bl, qs9ij, wlnsoh,