Lincoln :: 2002 - Idles Wildly / Getting Code PO171 And PO174?
Jul 18, 2012
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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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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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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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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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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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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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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The car idles rough on cold mornings but runs fine. It will stall while idling but starts back easily. I am getting a 1131 and a 1151 code with my scanner along with 0300 and lean bank 1 codes. I started having these problems after I had to remove the upper intake to replace coil packs. I was getting egr code and had an egr port completely block off but cleaned that out and no longer get the egr codes. Spraying carb cleaner around the engine I get a very slight bump in rpm around a couple of the intake ports could that be my problem or should I look deeper?
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I got a 04 mk4 gli 1.8t and I got a po171 lean code and I know it could be a vacuum leak the maf sensor and other things. But when I clear the code it takes a couple days for it to come back on. But when I do clear it and start the car for the first time the car idles read bad almost sounds like miss fire. The when I pull out it hesitates just for a little than runs fine. Could this be a bad or dirty maf sensor? Like I said it takes a while for the cel to come back on.
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My car, '99 ford escort,' engine light just came on when I started the car. I took it to autozone for one of those checks with the machine thingy. The code was PO171 bank 1 system 2 lead. The girl at autozone told me that I may need a oxygen sensor. What is a bank 1? What do I say when I go to the repair shop?
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Today when I was driving my car on the highway suddenly i saw the service engine soon warning, so many times i restarted the engine but its not working. After that I went to the service center and they said the code PO171, it might be oxygen sensory.
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2000 ranger 2.5 stick, coming to a stop i put in the cluch and the motor speeds up then slows down sometimes more sometimes less.
A month ago I had a code PO171, with a good idle. I cleaned the MAF senser then cleared the code, a week later the the CIL came back on same code. Then a month after the CIL is on the engine idle problem started. So I recleaned the MAF with MAF cleaner, cleared the code, and replaced the ICV with a new one. That worked good for about 3 days now the idle problem is back again.
The idle problem seam to be worse when the motor is warm or has been running at freeway speeds.
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While driving in a storm over the winter, I hit a skid and reverted to my old days of driving on ice (in a different stick-shift car). I tried to down-shift our '98 Camry (automatic)....so I placed it in reverse. It stalled. The car continues to run, but the check engine light has been on since that day.
I took it into a nearby garage the next week and they couldn't find any engine issues that time. They turned off the check engine light. It came back on the next day. I went to Advanced Auto Parts and got the code read: PO 171.
Since then, I've been driving the car once or twice a week, saving up $$ before taking it to my new repair shop -- to which we've switched for our other car. What might I expect to hear from them about our Camry? Am I damaging the car by continuing to drive it?
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I just bought a 1998 ford ranger with 228000 miles on it seems to run fine has the 2.5 4 cylinder with auto trans. Check engine light is on and code is a PO171. I've cleaned the mass air flow sensor and fixing to install new fuel filter. what the problem could be?
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2000 ranger 2.5 245000 miles. code po171 and idle problem has come back. Replace ICV, EGR, MAF, PVC, check fuel pres, air cleaner, plugs, wires, O2, check for vac leaks, Intermittently coasting at 20mph out of gear (stick shift) engine revs to 2500 rpm and holds until i brake to a stop then it idles down. So I disconnect the ICV and it runs perfect. (its a new ICV) something is telling the ICV to open up. a month ago it did the same thing when i replaced the EGR the idle problem cleared up so I thought that was it.
There is a relationship between the truck speed and the engine speed but how does the engine speed know the truck is moving when its out of gear. It work perfect for a month all of a sudden it starts this problem again. I am thinking of taking it to the ford dealer for a diagnostic test but I don't know how specific they can get on whats wrong I don't what to them to just say "oh you have a vac leak" . . . I know a 171 could be vac leak but the problem is so dramatic and off again on again it seems more like a part problem then a vac hose is either leaking or not.
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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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My daughter owns a 2006 Lincoln LS V8 and no matter where you set the controls on the panel it either blows wide open on "extremely" hot or nothing at all. The A/C is either not working, or something is very wrong with the controls on this vehicle. I've read older forums that all say may be the DCCV. In fact, we did the Self-Test and received a code 2798.
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The car overheated once and now it continually runs about mid range on temp gauge. I have no heat when it is turned up to 90 inside the car, it is running great but not sure where to start. I have checked coolant level and also pressure tested everything there is fine. I have ordered a cylinder head temp sensor and a heater core, as well as a new thermostat. pretty sure its not just a thermostat.
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I recently purchased a 2002 Lincoln Town Car with 204,000 miles but it runs like a champ. The Problem Is It burns too much gas i filled the tank up and2 days later I'm at a 1/4 tank without driving very much. My fuel economy states that i'm getting 8.5 miles a gallon this number goes up and down. I changed the oil and air filter still having the same problem. I need to know what I can Do to fix this I have heard the plugs and possibly the coils but I would like to know if there is more or perhaps something else I will be doing the work mostly myself.
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I purchased a new battery yesterday because the old one went dead. The car has been sitting for a month, upon completion of installing the battery, I cranked the car but it wouldn't turn over.
Lincoln LS 2002 V6....
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My 2002 lincoln LS run rough after warm up. Check engine light code is EGR , replaced EGR.
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