Ford - F150 :: What OB2 Code PO401 Stands For
Feb 27, 2011
OB2 Code PO401 came up. What does that code stand for.
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Feb 27, 2011
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Camry :: 98 - Getting EGR Code PO401 Continually
I have a 98 camry 4 cyl and am continually getting egr code po401. I've cleaned out and tested egr, replaced modulator and the vac switching valve. Replaced several hoses also. Car runs fine, in fact this code came the day after traveling 700 miles. It comes back on fairly quickly after properly resetting computer and 1 or 2 drives.
View 3 RepliesToyota - Camry :: Fixing Code PO401
is my Toyota camry going to stall cause it has po401 code and I think it has an muffler or exaust leak can the cause po401 code.
View 3 RepliesToyota - 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 Super Duty (1999-2016) :: Where To Put Jack Stands When Installing Front Lift Shackles
When installing front lift shackles, do you place jack stands under the axle, or the frame? I can't really find an answer. I assumed the axle, but i saw a thread and from what i could see it looked like it was supported at the frame and the axle was hanging free in the air. Just want to be sure before i start unbolting the stock shackles tomorrow and kill myself.
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What's the "s" under the "D" on the transmission ?
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What does the B stand for and what does it do Under the D- Drive gear? I have not been able to find this in the manual.
View 19 RepliesFord F-150 - 1997-2003 :: Check Engine Light Has Been On - Codes PO401 And PO446 Came Up
Ive got a question for all you code readers out there. My dreaded check engine light has been on for about a month. I bought a code reader recently and checked it out. Two codes come up; PO401 and PO446. What these mean. My book says "Exhaust Gas Recirc. Flow Insufficient Detected" and " Evaporative Emission Control System Vent Control Circuit Malfunction". Which sensors, location on vehicle, etc..... this is a 97 5.4L Expedition.
View 9 RepliesFord Ranger / B-Series :: Check Engine Light Popped Up Showing P1000 And PO401 Codes
1999 ranger 3.0. Check engine light popped up showing P1000 and P0401 codes. I think the p1000 is a system readiness test. Not sure why that came up and the 401 is exhaust gas problem. I put on a new autozone DPFE a few months ago..
View 5 RepliesFord - F150 :: 1997 - CEL On And P401 Code Popping Up
1997 Ford F150. 6 cyl, 4.2L, 138K miles. (Still) keep getting back the P401 code. I've checked (and re-checked) and cleaned all the ports and checked connections on the EGR valve, DPFE sensor and EVR solenoid. Everything seems to be working OK. Have replaced the EGR valve, DPFE sensor and EVR solenoid and (still) after clearing the code and driving ~30 miles, I keep getting the CEL light pop back on and P401 code popping up. Is their anything else to check ??
View 5 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 - 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 Exhaust System :: 2005 F150 - CEL Came On For Code P0420
Had the check engine light in the 2005 F150 (90,000 miles) come on. Got the code checked and its P0420. I know that has to do with the cat threshold levels etc. So I believe I am looking to replace the o2 sensor, if I am not mistaken.
How hard of a job is this? Ive done a decent amount of engine work. Just looking to see if that is the right thing to try first, replacing the sensor, before replacing the cat.
Also I know its the right bank, but if I am not mistaken there is a before and after the cat o2 sensor, which do i replace? Both?
Ford :: F150 2002 - Service Engine Soon Light Is On / Code 0141
The "service engine soon" light is on. I got code 0141 on the code reader. The repair manual for my F150 is stating that the code is for bank 1 sensor 2.I want to check the sensor, but I don't know the location of bank 1 sensor 2. I would like your advice as to the location of the sensor, and what should I check for?
View 9 RepliesFord - F150 :: 2003 - Code P0301 / Misfire On Cylinder 1 Keeps On Coming
I am at about my wits end with this P0301 (Misfire On Cylinder #1) code on my 2003 Ford F150 4.6L. I've replaced the coil pack on that cylinder, all the spark plugs, and replaced the fuel injector on that cylinder. We keep clearing the code and it keeps on coming back.
The weird thing is that it only misfires after the truck has set for a few hours and then it only misfires when I first put it in gear. Once I am out of the driveway and on the road it's fine for most of the day unless I let it sit for several hours and then it might misfire again.
We noticed that the connector to the fuel injector is wobbly and doesn't snap tight to the fuel injector (before and after it was replaced) due to the clips on the side not working well. We zip tied it together this afternoon to make it fit tightly to the fuel injector to see if that works.
What could be causing this? Other than that misfire the engine sounds great and the trucks runs very well.
Ford - F150 :: 1999 - Code P1131 / O2 Sensor Running Lean
I have a 1999 Ford f150 4.6L automatic. My check engine light had been on for awhile so I dug out my DTC code reader erased it, came back on 10-15 minutes later. I got the code P1131 sensor indicates lean which you would think is the O2 sensor a week later it won't start. Then randomly a couple days later it starts then that night it didn't. Hear is the parts that confused me. I don't believe an oxygen sensor would cause it not to start, it's cranking nice just won't turn over. And when you get the code P1131 I believe it bay 1 where the readings are off Well here's my readings.
Fuel system 1 CL-FaultCalc load 34.1%ECT 201.2 FSTFT B1 -1.6%LTFT B1 0.0 %STFT B2 -1.6%LEFT B2 0.0%ENG RPM 1101VEH SPEED 27 MPH
It looks like to me bay 1 and 2 are off? I'm not mechanically challenged, but not a mechanic either, I do most my own work on my vehicles..
Ford F-150 - 1997-2003 :: 2002 F150 5.4 - CEL Came On For Code P0174 - Misfire On 7 Of 8 Cylinders
So the past few weeks my truck has been sputtering a lot. It seems to do it more so in low RPMS but when I lay on the throttle I didn't really notice it. I haven't had time to look into the issue but yesterday the issue got drastically worse and the CEL finally came on. Registered P0174 as well as a number of other codes including misfires on 7 of the 8 cylinders.
So far I have replaced the fuel filter. Spark plugs are only a few months old. I didnt think it would make sense for all of the coil packs to go out at once so I was thinking either a fuel issue or vacuum leak. Why would it only spit out P0174 (Banks 2) and not show P0171 (Banks 1) along with it? Fuel pump? Vacuum leak? Where should I start? 2002 F150 5.4L...
Ford - F150 :: Check Engine Light Started Flashing / Cylinder 4 Misfire Code
1997 Ford F150 - 133K Miles - 6cyl - 4.2L. This is a truck that gets less than 2K/year put on it. Has had "issues" with worn bearings and holding oil pressure for a few years now. Yesterday, the check engine light started flashing (as opposed to solidly lit) and the code came back as a cylinder #4 misfire (only the one code). The truck was clearly not firing on all cylinders and at idle, ran terribly (couldn't be driven). I just did a compression test on all the cylinders and all measured around 140-145psi except the #4 which read almost 170psi. I rechecked this a few times as well as a couple of the others and am now sure of the results. What could cause this one cylinder to have a higher compression ? Is whatever is causing this increase in the compression, also be the cause of them misfire ?? I'm stumped here and quite frankly, expected the compression on the #4 cylinder to be really low as opposed to the others.
View 13 RepliesSanta FE SM (2001-06) :: Codes PO171 And PO401 - Car Starts To Bounce A Little Until Let Off The Gas
I am getting two codes, p0171 and p0401. Both point to something with the fuel are mixture I believe. My problem is that I can not figure out what the problem is. As far as I can tell there is not a vacuum leak. My MAF sensor looks clean and close to brand new. The codes come on and the car seems to want to jump. It does not stall, just starts to bounce a little until I let off the gas. And it does not do it until the car is warmed up. 2001 Santa Fe .....
View 4 RepliesFord Fuel System :: 2003 F150 - Service Light Randomly Comes On / Code For Left Bank Running Lean
2003 f150 supercrew with 166,000 miles on it. Daily driver. Service light randomly comes on and when code reader was put to it shows "left bank running lean." Will clear it and will randomly come back on. Truck seems to be running fine. No issues engine. Bad sensor? Or bad injector? Maybe way to test?
View 1 RepliesF Series :: F150 4.2l V6 With Code P1518 - How To Reach Valves Of Bank 1
Truck was running fine all day then as I pulled into the driveway the service engine light came on. Did a scan and code says , intake manifold runner stuck open bank 1. I was told they are at the back of the manifold but I can't even get a mirror in that tiny space. What is involved in reaching these two valves and how do I know which is bank 1?
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