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99 Ford Super duty V10 DTC code P0170
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valleybusman
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Feb 28, 2018, 10:44 PM
Post #1 of 12
(1936 views)
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99 Ford Super duty V10 DTC code P0170
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Got a Ford super duty with a V10 automatic and 4 wheel drive with 107000 miles . An employee came to me and said truck wouldn't idle right and the service engine soon light was on . Told me one time it died and almost didn't start . My scan the first time said I had a DTC 0170 and a DTC 174 . So I cleared the codes truck didn't run any better but the service light was off . I thought O2 sensors then I went into my data space and it said both O2 sensors were off . Then today brought it back in the shop I checked codes again . DTC 174 was gone but still had the 0170 the light came on . I did a full DTC scan and that code and said I had a hose gone before intake hose ? So I am trying to figure what all this means . Thanks
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Tom Greenleaf
Ultimate Carjunky
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Mar 1, 2018, 2:33 AM
Post #2 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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At about 19 years now lots of possible reasons but some are/were common specifically vacuum elbows Ford had a bad few years with the larger ones. Plain check them all hard to believe they haven't already been ALL done and ready for another round.
Code suggests rich to me. The fix is everything to do with incoming air and integrity of vacuum + PCV lines also. Rule those out so they don't confuse the diagnosis and before you wreck converter(s) too.
Exhaust leaks should be ruled out as well.
"Employee driven vehicles" you said. That alone scares me just IMO,
T
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Discretesignals
Ultimate Carjunky
/ Moderator
Mar 1, 2018, 6:22 AM
Post #3 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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0170 is not a valid dtc.
Not sure what you mean by O2 sensors were off. Do you mean the fuel system was in open loop?
There is no scan tool that is going to tell you that you have a hose off.
p0174 is a lean code for bank 2. Do you hear any hissing noises (vacuum leaks) under the hood while the engine is running? What are your long and short term fuel trims numbers for both banks at idle?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 1, 2018, 7:06 AM
Post #4 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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Not valid DS? IDK - maybe my read says look for rich on bank 2. Why if that's it was the age of this thing and what's been done for care all along or just an ignored company vehicle. I just did run into lots of just defective from new rubber elbows to plastic hose LARGER size stuff made stuff up a one time fix for a one time person needed help they were all bad and soft or had holes outer side of those elbows. That one I wont know - could have been solvents cleaning the engine wrecked stuff? It wasn't that old then. Only time I saw it was running perfectly when it left never seen again said get them all new (pointed them out) and get it done I can't make more than one elbow while you wait type thing,
T
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valleybusman
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Mar 1, 2018, 8:06 AM
Post #5 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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I may have the wrong DTC ? The code said it was the number one bank .I use a Genisys 3.0 and when I went to datastream and looked at readings it said O/2 were off on both sides . I then ran a complete DTC check and came up with a hose problem up stream ?
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Discretesignals
Ultimate Carjunky
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Mar 1, 2018, 8:25 AM
Post #6 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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P0170 is a basic code meaning the the fuel trim is out of range either negative or positive. I honestly haven't seen that code pop up on any of the vehicles i've seen. Its a really generic code and P0171,p0172,p0174, and P0175 are most of the trim codes they use now a days.
The P0170 doesn't show up in the dtc list for that vehicle. It is probably p0171 bank 1 lean. If the fuel trim is positive at idle and improves at higher rpm, it will probably be a vacuum leak of sorts. Then it would be time to smoke test the intake to find any leaks.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Mar 1, 2018, 3:58 PM)
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valleybusman
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Mar 1, 2018, 9:42 AM
Post #7 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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I just checked further I get a P 0171 and a P 0174 codes . When I ran some tests I get a problem with upstream hose disconnected tst . Hope this helps . thank you at all
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valleybusman
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Mar 1, 2018, 10:25 AM
Post #8 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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I also show on my scan tool TID 41 CID 11 This area has failed
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Discretesignals
Ultimate Carjunky
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Mar 1, 2018, 11:21 AM
Post #9 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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You're getting ahead of yourself here. You need to troubleshoot the reason you are getting the p0171 and P0174. You need to find out what is causing the engine to run lean. Vacuum leaks, misfires, low fuel pressure, faulty MAF, exhaust leak near o2 sensor, and etc. can cause lean codes to pop up.
The $06 test results that is failing has to do with the EGR differential pressure feed back which you can figure out later. You really need to start with your P0171 and P0174 codes first.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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valleybusman
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Mar 1, 2018, 1:31 PM
Post #10 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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Thanks for the input . I found the problem . You were right about a vacuum leak . When I checked the hoses I found the PCV hose has a split where comes out of the intake . I covered the leak and truck ran smooth .Thanks for the help !
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Tom Greenleaf
Ultimate Carjunky
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Mar 1, 2018, 2:57 PM
Post #11 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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? Whatever you did to "cover" a hose leak or vacuum hose part anywhere patch isn't the fix - toss that whole failed hose, elbow or part for new and look for others.
Quality of this stuff? Who knows? Time will tell what was good and what wasn't? Trouble is driving with the problem just snowballs into more trouble than the problem that first caused it get right on anything that isn't allowing it to run properly,
T
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valleybusman
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Mar 1, 2018, 3:27 PM
Post #12 of 12
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Re: 99 Ford Super duty V10 DTC code P0170
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I didn't patch it . I realize I need another hose . What I meant was I cover the hole with my fingers and when truck ran right I knew that was my problem . Ford is sending me a new hose . Thanks
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