Ford F-150 (2004-2008) :: 2007 4.6L V8 - Code P0401 - Insufficient Flow - EGR Identification
I am preparing to combat the old P0401, Insufficient flow issue. While looking at the steps in Alldatadiy the very first decision essentially forks on "EGR System Module" or "Others".
I am just guessing that, since the choice is there, some engines will have one and some will have the other. But I thought I'd come here and see if I could learn a little more about it.
How can I tell what my truck has? I'm sure there is some difference...
Santa FE SM (2001-06) :: 2004 2.4l - Code P0401 / EGR Insufficient Flow
EGR insufficient flow. EGR valve was pretty bad looking seemed a bit sticky when opened so I replaced it along with gasket. Reset the computer but check engine light came back on code p0401 again. I know you can test by pinching the yellow striped hose at the throttle body to see if the solenoid is bad. The engine will stumble a bit when you pinch it closed, or so I am told. However when I pinch the hose, nothing happens. I do notice that the car does idle kind of roughly.
View 1 RepliesFord - F150 :: CEL Code P401 - EGR Flow Insufficient
1997 Ford F150. 6cyl, 4.2L 138K. Have CEL on and code reads: "P401 - EGR Flow insufficient". I replaced the EGR valve and checked the ports leading into them and they seem clean. There is one additional component called "EGR feedback sensor" which I really don't want to replace unless I can determine that this is faulty.
View 1 RepliesFord Aerostar :: P0401 Insufficient EGR Gas Flow Code
My '96 4L developed the infamous P0401 insufficient EGR gas flow code 6 months ago. Rough running. Forgot to license it, now the St. Emissions Test was due before I could get new tabs issued. Finally got some warm dry weather to work on it. Started with the electrical measurements per DPFE graph of EGR flow vs electrical output to the PCM.
Showed the DPFE sensor failed, low V output max 2v. The old OEM aluminum body DPFE sensor was still in the old girl after 16 years. Corroded internally and ext., one hose nipple almost corroded off. Eureka. Put in a new Motorcraft plastic body upgrade. Same darn code.
Retested everything from the EGR vacuum valve that feeds the EGR valve to the new DPFE and then the EGR tube from the exhaust pipe. All tested ok electrically and leak wise. No fresh air leaks in the EGR V or EGR tube.
All pointed to restriction in EGR gas flow when PCM demanded it. Ran small stainless steel wire down the upper EGR tube line nipple to the EGR orifice trying to clear carbon build up, still the same P0401. Poured several cups of paint store acetone down each EGR tube hose with engine off and at 2k rpm to emulsify and dissolve the exhaust carbon out. Engine vacuum sucked the acetone up thru the EGR valve also cleaning it internally.
Let set overnight and took out for test drive. Still P0401. Almost ready to drive the green beast to the crusher of death.
Poured more acetone in the EGR and let set for 2 days prepared for the emissions station test failure then repair at emissions cert. shop with a shop waiver for no effective repair. Decided that the EGR tube or EGR valve were leaking fresh air, rusted and corroded. The end nuts on the tube were rusted away. EGR tube NLA from any source.
Went to the emissions test today and passed flying colors. NO P0401, drove all day on business. Got relicensed.
The old girl runs and drives like a dream, she's actually parked and sleeping in the garage tonight all pretty and shiny with a wash and wax job, got a reprieve from the Jaws of Death
Ford - F150 :: 1997 - P401 Code / EGR Flow Insufficient
1997 F150. 6Cyl, 4.2L, 139K miles. The truck threw a P401 code(EGR Flow insufficient)and won't pass emmisions here (due by the end of March). So far this is what
I've done : Replaced EGR, replaced DPFE, replaced EVR solenoid, removed throttle body manifold under EGR and cleaned all ports (they weren't even dirty), cleaned and checked all vacumn lines from the DPFE to the main EGR tube from exhaust. Also cleaned the main EGR exhaust tube.
Everything is squeaky clean. All voltages going to the DPFE/EGR are spot on and the whole system seems OK. But the P401 code literally comes on almost immediately (less than 2 miles) after clearing the code (I hooked up my scanner to see how long).
Ford F-150 - 1997-2003 :: 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. The truck only has 30K miles and the warranty expired 24 May.
View 14 RepliesFord F-150 - 1997-2003 :: 1999 V6 - Code P0401 / Insufficient EGR Flow
Dreaded insufficient EGR flow. I've read I should clean the EGR ports.
I can't really find where these are? I took the throttle body off.
What I should do with this thing? I also get a hesitation on initial take off.
1999 F150 4.2 V6 ... 160k miles on it. Runs good otherwise.
Ford F-150 - 1997-2003 :: P0401 - EGR Insufficient Flow / P0455 Code
Has a P0401 code EGR unSufficient flow. Ive read several things that it could be, from a DPFE sensor to the EGR valve it's self our that the port going into the TB could be plugged. Truck drives fine does not have a miss or anything noticeable when driving other than the CEL, trucks a 4.6 with 200k on it. Forgot to mention it sometimes gets a P0455 code but i assumed that is gas cap. or could it be related?
View 7 RepliesFord Ranger / B-Series :: OBD-II Code 0401 Then 0402 - EGR Flow Insufficient / Excessive
I got an 0401 EGR Flow Insufficient last week. I cleared it and it showed up again after a couple of days. I replaced the EGR Valve and the 0401 reappeared. I replaced the DPFE and the code did not reappear. Great!
About a week later, I got an 0402 EGR Flow Excessive. New EGR Valve. New DPFE. The hoses to and from the DPFE to the tube look decent. They don't appear to have any build up inside. Code 0401 or 0402 to the tube?
My first instinct is to replace the EGR valve again, assuming the one AutoZone gave me is stuck open. Is there any servicing I can do to it first? Like maybe soak it in carburetor cleaner? Or spray it with WD-40?
Ford F-150 - 1997-2003 :: CEL Came On - Diagnostic Tool Reads Code 401 / EGR Insufficient Flow
I just bought a 1997 ford f-150 4x4 with 4.6 motor. the check engine light came on. My diagnostic tool reads code 401 (egr insufficient flow). I've replaced on the parts on the egr side of engine. light still on. could it be a leak in the vacuum lines. I don't see any wear.
View 4 RepliesAccord :: CEL On With P0401 Code - Insufficient EGR Flow
I recently purchased a 2000 Accord coupe v6 with 180k on the clock. I've noticed the gas mileage isn't what it should be. The check engine light was on when I bought it turns out it was a p0401 code. I was told at the dealership insufficient egr flow would cause the car to run rich. So I figured that's what is killing my gas mileage. Well after cleaning the egr port, replacing the egr valve, changing the spark plugs and changing the oil there is no improvement.
View 7 RepliesFord 6.0L Power Stroke Diesel :: Sticking Turbo - EGR Insufficient Flow P0401 Code
The truck in question is a 2004 6.0L Excursion, stock original turbo, no tunes, and EGR cooler delete done 1 year ago. Scanned for codes and none were found except for EGR insufficient flow P0401 code which is due to the EGR cooler delete.
Upon startup (no issues there) the VGT reads 67-70, now once the truck goes to high idle to warm up (1150 or so RPM) the VGT slowing climbs to 85 and stays there. If I blimp the throttle or step on the brake it goes back to 67-70 at normal idle. This has been happening for a few months now on a regular basis. I have checked the MAP, BARO, and EBP readings at KOEO and they are all within 0.6 of each other (14.4-15.0). The EBP tube was checked and cleaned (no buildup present)..
Camry :: Check Engine Code P0401 - Insufficient EGR Flow
I just got a Check Engine light on yesterday. I went to Autozone and got an OBD-II Trouble Code: P0401, Insufficient EGR Flow Insufficient. The Autozone guy showed me an EGR valve for $164 and said it maybe blocked or something. I also checked with a friend who says that as long as the engine is not overheating it should be okay for driving for now.
So the far the car runs just fine, I haven't experienced any issues out of normal. Does the code mean the value need to be replaced?
Toyota - Camry :: 1996 - Code PO401 / Insufficient Exhaust Flow
1996 Toyota camry le 4 cylinders has code po401 does it damage engine what will it do. Insufficient exhaust flow...
View 3 RepliesFord Ranger / B-Series :: 2000 - CEL - P0401 - EGR Flow Insufficient?
I have a 2000 Ford Ranger 3.0L engine, 2 wheel drive, with automatic transmission. Check engine light came on about 3 months ago. checked with scanner and P0401 EGR flow insufficient came up. cleared it and it came back. truck seems to be running fine. I didn't take autoshop as a kid, so i probably will need a little hand holding on this one.
View 14 RepliesLexus RX 2004-09 :: 2008 RX350 VSC OFF Light On - Mass Air Flow Sensor Code
"VSC OFF" light came on the other day. I took my RX350 to the dealer. The dealer said Heater Element sensor is bad. They didnot have this part in stock. I googled this part. Nothing comes up under that search. I took it to Autozone and the code came up as Mass Air flow sensor. Are both of these same thing?
View 7 RepliesGolf IV / Jetta IV :: CEL Comes On - Insufficient Air Flow
So my check enginr light has been on for a while saying "po411" "insufficient air flow" but dont know where the vacuum leak is coming from. But today I was working under my car and saw this "hose" that is connected to the air pump looks like it's leaking??
View 3 RepliesHonda - Accord :: 1998 - EGR Insufficient Flow Detected
I have a 98 Honda Accord, automatic, with a 3.0 VTEC engine with 189,350 miles. It was diagnosed with cod P0401: EGR insufficient flow detected.I was told and apparently in the instructions it states the following to repair/fix the problem:
Unplug the EGR Port in the Intake, remove upper portion of Intake Manifold, drill EGR port, install Sleeve and replace EGR Valve. Instructions also indicated I need a EGR Pipe kit: 06175 P8L-A00 which contains a special tool to drill manifold and install Sleeve: Kit 07ZAO-P8AA000.
Is this a easy job? I'm also confused about needing the special tool (I believe it's a drill bit) and drilling the port. Are either one of these two Kits I mentioned really needed? What do you recommend I use to clean the port? I thought I could just clean the port (hole) and replace the manifold gasket.
Toyota - Matrix :: 2004 - CEL On / Code Indicating A Recent Failure To Shift Properly
So, I have a 2004 Toyota Matrix with about 104K miles on it, regular oil service and general maintenance. A few weeks back, my check engine light came on, took it in for diagnosis. The code was for the TCC, indicating a recent failure to shift properly. I've noticed no unusual behavior before or since the light came on, but I'm told that this is an indication of a failing transmission. My local transmission repair shop took it for a drive and said that this was probably the case as well. Estimates for a rebuild run in the 2200-2400 range. That said, I've also seen that it could be that I just need new transmission fluid. I had the fluid replaced, again, no noticeable shifting problems or unusual car behavior.
I'm wondering if
a) I should just drive and maintain the car as usual and if the light returns, then consider a rebuild or
b) begin to make preparations to get rid of the vehicle.
Bluebook estimates this in the 3-3500 range, so I'd assume it's sale value would be quite a bit less (perhaps less than the cost of a rebuild) for obvious reasons.