Ford F-150 - 1997-2003 :: 2001 5.4L Throwing Codes PO135 / PO155 / PO174 And PO171
May 11, 2016
I have a 01 f150 7700 with a 5.4L and its throwing codes po135, po155, po174, and po171. Here is the history, last year had same code and found it was a bad ELLBOW on pcv hose, replaced and that fixed it, I also had a crack on egr valve and I replaced that too. This Jan truck was running bad in the morning and I traced it to a bad idle air controller, replaced it. I got a code and guy said I had a bad pcv valve so I replaced it.
About 3 weeks ago check engine light came back on with the 4 codes listed above, I replaced both front o2 sensors, 250,000 mile so I thought that was it but came back same code, I took it to a local mechanic and he said that the intake gaskets need replaced, but he call me later and said I had no leaks on the intake and that he did find another vac leak. He didn't charge me anything and sent me on my way.
I drove the truck about 50 miles and same codes back, so to recap I have cleaned mad sensor, replaced both front o2 sensors, a new egr valve, a new idle air control, pcv valve, pcv hose and ELLBOW, don't know what to look at next. Any clues?
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Everything started with the typical lean bank 1 and bank 2 codes. I started at the basics change fuel filter PCV Hose & Valve clean the MAF changed air temp sensor(it was cheap). Still had same po171&po174 codes. Bought a obdll reader. After 3 weeks of nothing being accomplished I bit the bullet and took it to Ford for a diagnostic and they said it was definitely the intake gaskets.
I changed the gaskets and now this has gotten worse! I started the truck after reassembly and it ran like crap!
Checked everything and everywhere and could find nothing wrong. I then took off the vacuum line to the EGR and everything smoothed out. I didn't mess around and replaced the EGR the DPFE and the vacuum solenoid.
It still runs like crap especially at idle. I did the tests with my digital meter and found the vacuum solenoid is calling the EGR to be open all the time. I suspect that this would be the fault of the PCM? What should be my next course of action?
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This truck has been running fine then as my son was getting off the interstate it started acting like it was running out of gas then died. I went to tow him in and it cranked right up and never had another problem for a week. Yesterday he drove 80 miles away when the same thing happened shortly after he got off the interstate. He replaced the fuel filter which it probably needed but still won't start and stay running. It cranks right up the immediately dies.
First time this happened it was throwing codes PO171 and PO174. Now it is not showing any DTC's at all and none pending. We see no frayed or bad wires and all vacuum hoses seem fine. He cleaned the MAF with no change in behavior.... If it were an outboard motor or some kind of boat I'd say the problem is in the ignition switch except it does run a very short time before dying. If I immediately try to restart it won't stay running. If I let it sit for a while then it will run for about a half minute.
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I have the notorious PO171 and PO174 codes on my 2003 5.4L that come back whenever I erase them. I cannot figure out the problem. Whenever I start the truck it cranks for 3-4 seconds before it finally fires, then rpm's are very low, then they finally pick up. I have noticed a loss in power as well. I have completed a full tune-up (spark plugs, coils, boots, filters, etc.)
I have checked the vacuum and PCV lines numerous times, I have yet to find a leak. MAF appears clean. I am running a K&N CAI setup. O2 sensors a good, replaced the gas cap. The only other problem I can see is a bad PCV valve? I hope it isn't a manifold gasket. The truck has been very well maintained and still looks brand-new throughout at 250,000 miles.
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I have a 2000 F150 4.2L and I have 2 codes PO304 & PO174 so far I have changed my plugs & wires,fuel filter,mass air flow sensor, and coil pack...it is still running rough under a load and a little rough on idle..
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2002 F150 5.4 v8,,, I had troubles just over a month ago with a po305 code. i got the truck fixed with 2 new coils n some gaskets. I am having these po353 & po171 codes pop up now. The truck is running rough and I am curious to if its just another coil problem or if their is something I am overlooking or just don't know about?
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2001 F150 4.6. Just replaced all 4 oxygen sensors and spark plugs. Replaced rubber grommet on brake booster as it was leaking vacuum.
Truck is still running rough hesitating.
Pulled codes came up as PO141 oxygen sensor heater circuit. PO171 passenger side cylinders running lean. Fuel trim outside limits.
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Does the 2011 6.2 have a DPFE sensor? If so where is it located? Codes are lean bank one and two and random misfire. Suggestions I have read online are replace DPFE sensor. I don't think maybe there is one on a 2011 6.2. Who have had it and had it fixed. Other things I see are clean the MAF sensor. Look for vacuum leaks.
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My trucks throwing 2 codes after traveling at low speeds and getting pretty warm. Drove it home after it cooled down. P1451 with is the EVAP Cannister Vent solenoid and P0353 which is Cylinder 3 Primary/Secondary Ckt. I keep getting told these are not connected but im not sure I believe that. Ive replaced the coil with 2 of my stock coils already with no luck, ive replaced the spark plug as well.
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Recently bought 98 f150 xlt 3 door 5speed 4x4 4.6l 230k miles for $1k was throwing misfire codes on 1,8,4,3 cylinders. Usually throws two cylinders at a time and never the same cylinders consecutively
Parts replaced:
coils...msd blaster
belden wire
motorcraft plugs...when i did these it ran perfect for a tank of fuel...18mpg no stumble
two cans seafoam through the tank
tank was dropped and drained
fuel filter
one can seafoam intake cleaner
3" exhaust from the Y pipe back
MAF cleaned
Previous owner said to have tested and cleaned injectors but I am not positive it was done... I don't think its mechanical because it wanders through the cylinders and when i changed the plugs it ran spot on. it gets worse the warmer the truck gets also.
injectors?
clogged small cats?
sensor?
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so i bought this truck about 3 months ago and it was running real bad when i got it, I went ahead and changed the lower and upper intake gaskets, cleaned throttle body, egr ports on lower and upper intake, did timing chain cover gaskets and 3 bad injectors i found while doing gaskets, truck ran better but still black smoking(running rich) and getting 8 mpg. So I changed fan clutch,fuel pump fuel filter,airfilter,MAF sensor(old one was pulling 14.4 volt), DPFE sensor and all 4 oxygen sensors(old ones carboned up and real sooty).
I've checked my egr valve while idling and when it opens the engine just about stalls, truck seems to be running better but CEL light came on again and is throwing these CODES:
P0453 (evap emission ctrl sys pressure sensor high input),
P0141,
P0153,
P0135(oxy sensors),
P0401exhaust gas recirculation flow insuff detected,
P0460fuel tank level indicator circuit error.
And I believe I've told everything i know ...
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My 02 navigator does not idle right when in park or sitting at stoplight. I've gotten codes po171 and po174. The truck ran fine for a good 3 months after the (service engine soon light) came on and I got these codes so I decided to do nothing.. Now it idles bad and has even shut off twice on me while pulling into driveway. I changed the MAF and that did nothing.. Should I assume its the o2 sensors or is there a chance my CAT is shot.
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Looking for some experience/recommendations for the "what to do" and "in what order" for an error code. Recently the "SERVICE ENGINE SOON" light came on and has stayed on for the last 2 weeks. It has don this before after a heavy rain but went off after a few days but not this time. I took it to Advance Auto who hooked it up to a Trouble Code Reader and got back "PO174- Bank 2 system to lean". From what I've read from the Haynes book and other forum postings this is either a O2 sensor issue or a intake manifold gasket issue? Does this sound right? Next is how to go about addressing this issue in a systematic manner so as not "fix" 10 things that don't need fixing and not running to mechanic and paying a buttload for something I can do myself for less.
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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 .....
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03 Alero 2.2 with no maf sensor.
I have both codes 141, 171. I am trying to figure out if I should just change rear oxygen sensor or something else.
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So my girlfriends's 2001 2.0 Golf (engine code AVH, 153k miles) began throwing codes for misfire on cylinder 4 and for the o2 sensor (post-cat) recently. I went ahead and replaced the spark plugs, wireset, and the coil pack. They were way overdue. The CEL went away for like 30 miles, and then came back. Now it's reading misfire on cylinder 3 and the same thing for the o2 sensor. What else it could be? Search is coming up blank, most people replaced the coil pack and the CEL went away.
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Ok, did a quick search, found nothing. Is there a way to get CEL codes without a reader on '01 F150? I know the way on 80's stuff, is there on newer stuff?
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I got an 2001 f150 4.2l v6, 5speed. It started running real rough almost like it was hitting on only 3 cylinders I replaced the crank sensor and did a tune up on it along with a new coil pack and now it won't hit a lick the plugs are getting fire, it's getting fuel but, will not start it's not throwing any engine codes. Which leads me to believe it may have a bad ecm.
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I have a 97 Honda Civic Manual transmission and my Check Engine Light Came On. The error code is P0135 which shows up as needing a O2 sensor. My question is:
1. Do I need to replace it?
2. How long do I have to replace it?
3. Will driving with it as it hurt my car?
The weather is getting colder and I read that could be the cause. I really don't have much extra money but I don't want to kill the car. I have kept up on Oil Changes with MaxLife Full Synthetic, Radiator Flush, etc if that matters. I also went into Valoviline Instant Oil Change and they double checked all of the fluid levels and that was OK.
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2001 f 150 5.4 liter with it being code pops up saying cylinder one misfire, I've charge coil and spark plug ran great for awhile now starting to act up again. Got coil check and says still good and look at spark plug and looks still in good shape being just replace two weeks ago. It's running fine but if it sits over night and I get in and start it and begins to shake when I but it in drive and don't even need to move the truck just place it in drive with foot on break. I drive it awhile and it stops and runs fine?
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My truck, the aforementioned 01 f150 5.4 has been running fine but has had the codes p0401 and p1740. I know what they both mean I just haven't fixed them yet. Today I went to move my truck and it wouldnt start. It turned over fine and would hit some but wouldn't start. Would the tcc solenoid be the cause of that? Also the reason my egr is throwing is because there is a line that is not connected but I have no clue where it connects to... Where is the best place to get diagrams for the egr system.
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