P0171 & P0174 Both Banks Lean
#1
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I have looked everywhere, traced all the hoses even used propane to spray and listen for engine rev changes. I cannot find a vacuum leak in either the lines or the intake, is it possible it's not an vacuum leak?
Heres the situation, I only get the code when I first run the engine. After start up, the code will set within 3 to 15 minutes, driving or not. Then, if I reset the code, I can literally drive for hundreds of miles with no code until I stop and restart the engine. You would think if it were a vacuum leak, the code would keep coming back soon after reset every time.
I've changed the fuel filter and air filter, cleaned the MAF and run Seafoam thru the tank twice, no change.
Any ideas?
I
Heres the situation, I only get the code when I first run the engine. After start up, the code will set within 3 to 15 minutes, driving or not. Then, if I reset the code, I can literally drive for hundreds of miles with no code until I stop and restart the engine. You would think if it were a vacuum leak, the code would keep coming back soon after reset every time.
I've changed the fuel filter and air filter, cleaned the MAF and run Seafoam thru the tank twice, no change.
Any ideas?
I
#2
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Get the official jag doc and read other threads.
You'll see the known causes and also that they're 2-trip codes plus what that means![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
You normally cannot see or hear the cause of the codes because the car can detect what you can't easily find. So... that's why people have described in detail what to do. And why you want to read those posts.
You'll see the known causes and also that they're 2-trip codes plus what that means
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
You normally cannot see or hear the cause of the codes because the car can detect what you can't easily find. So... that's why people have described in detail what to do. And why you want to read those posts.
#3
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Get the official jag doc and read other threads.
You'll see the known causes and also that they're 2-trip codes plus what that means![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
You normally cannot see or hear the cause of the codes because the car can detect what you can't easily find. So... that's why people have described in detail what to do. And why you want to read those posts.
You'll see the known causes and also that they're 2-trip codes plus what that means
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
You normally cannot see or hear the cause of the codes because the car can detect what you can't easily find. So... that's why people have described in detail what to do. And why you want to read those posts.
Also, I've done the search for the 2 codes, I return 4 results, not a huge help for my situation. Could you point me in the direction that may help?
Thank you!
Eddie
#4
#5
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I have had the same problem. I think the computer controlled engine systems adapt so quickly that unless you look at the fuel trims you just can't hear any changes.
When I did the exact same thing I was certain the engine did NOT react to anything I did BUT when I monitored the fuel trims it was very easy to see what reacted and how fast.
I found my leaking P/B connection in less than 5 minutes.
It really is a world of difference.
.
.
.
When I did the exact same thing I was certain the engine did NOT react to anything I did BUT when I monitored the fuel trims it was very easy to see what reacted and how fast.
I found my leaking P/B connection in less than 5 minutes.
It really is a world of difference.
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wardo5757 (02-23-2018)
#6
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I just told you in the previous response how many I got and asked you specific questions.
Are all of your 21,000 post on this forum as useless as this one? If so, maybe you should give your keyboard and forum users a rest, and not post your bullshit responses...
Are all of your 21,000 post on this forum as useless as this one? If so, maybe you should give your keyboard and forum users a rest, and not post your bullshit responses...
#7
![Default](/forum/images/icons/icon1.gif)
I have had the same problem. I think the computer controlled engine systems adapt so quickly that unless you look at the fuel trims you just can't hear any changes.
When I did the exact same thing I was certain the engine did NOT react to anything I did BUT when I monitored the fuel trims it was very easy to see what reacted and how fast.
I found my leaking P/B connection in less than 5 minutes.
It really is a world of difference.
.
.
.
When I did the exact same thing I was certain the engine did NOT react to anything I did BUT when I monitored the fuel trims it was very easy to see what reacted and how fast.
I found my leaking P/B connection in less than 5 minutes.
It really is a world of difference.
.
.
.
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#8
Join Date: Jan 2012
Location: Newport Beach, California
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#9
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If you REALLY cannot get 100s of posts explain EXACTLY what steps you used and someone will HELP you. Just complaining isn't gonna work.
Last edited by JagV8; 02-23-2018 at 05:39 PM.
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DanteDiVolo (12-03-2021)
#10
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Try harder to use Search or even use google. When a long term member tells you there are 100s of matches you know YOU are doing something wrong. Either try harder or ask.
If you REALLY cannot get 100s of posts explain EXACTLY what steps you used and someone will HELP you. Just complaining isn't gonna work.
If you REALLY cannot get 100s of posts explain EXACTLY what steps you used and someone will HELP you. Just complaining isn't gonna work.
Just to be clear, you have been absolutely no help, I've been in many forums where guys like you like to chime in just to move thier thread count, and my complaining is only about your ignorant non-relevant responses. I've gotten more help from other "non-long term members" here who understand the purpose of these forums.
#11
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#15
#16
#17
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LOL, and you're still as useless as you were in post 2, but hey! You got your post count up quite a bit in this thread! Good for you, useless.... I'm sure you have at least one more post in you tonight, go for it!
If you were to stop being so pompous and read, then comprehend my original post, you would see that I described my search terms and told you exactly what that search returned. You will also note I asked you a direct question quoting your first response, all of which you've chosen to ignore. Maybe you have problems comprehending, maybe you're just dumb, I don't know.
I do know, you have been completely useless here, you are a pusillanimous nuisance, if you can't help, then go away. You can be sure, my little problem will be fixed with or without your help, it's how we conduct our selves here that makes the difference, and you have been nothing but useless.
If you were to stop being so pompous and read, then comprehend my original post, you would see that I described my search terms and told you exactly what that search returned. You will also note I asked you a direct question quoting your first response, all of which you've chosen to ignore. Maybe you have problems comprehending, maybe you're just dumb, I don't know.
I do know, you have been completely useless here, you are a pusillanimous nuisance, if you can't help, then go away. You can be sure, my little problem will be fixed with or without your help, it's how we conduct our selves here that makes the difference, and you have been nothing but useless.
Last edited by wardo5757; 02-26-2018 at 10:22 PM.
#18
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LOL, and you're still as useless as you were in post 2, but hey! You got your post count up quite a bit in this thread! Good for you, useless.... I'm sure you have at least one more post in you tonight, go for it!
If you were to stop being so pompous and read, then comprehend my original post, you would see that I described my search terms and told you exactly what that search returned. You will also note I asked you a direct question quoting your first response, all of which you've chosen to ignore. Maybe you have problems comprehending, maybe you're just dumb, I don't know.
I do know, you have been completely useless here, you are a pusillanimous nuisance, if you can't help, then go away. You can be sure, my little problem will be fixed with or without your help, it's how we conduct our selves here that makes the difference, and you have been nothing but useless.
If you were to stop being so pompous and read, then comprehend my original post, you would see that I described my search terms and told you exactly what that search returned. You will also note I asked you a direct question quoting your first response, all of which you've chosen to ignore. Maybe you have problems comprehending, maybe you're just dumb, I don't know.
I do know, you have been completely useless here, you are a pusillanimous nuisance, if you can't help, then go away. You can be sure, my little problem will be fixed with or without your help, it's how we conduct our selves here that makes the difference, and you have been nothing but useless.
Some of the responses trying to help those of us asking for help do come across a little short sometimes but probably not intentionally. I found I had to suck it up and appreciate the vast majority of people who really are well intentioned. If you find that freaking cause of your lean codes, please post it so I can see if its something I have not yet checked on my s type.
#19
Join Date: Oct 2007
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https://www.jaguarforums.com/forum/s...archid=8669679
I get 418 responses hard to say how relevant they are.
There are a multitude of causes for those codes no body will have a magic cure.
I get 418 responses hard to say how relevant they are.
There are a multitude of causes for those codes no body will have a magic cure.
#20
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https://www.jaguarforums.com/forum/s...archid=8669679
I get 418 responses hard to say how relevant they are.
There are a multitude of causes for those codes no body will have a magic cure.
I get 418 responses hard to say how relevant they are.
There are a multitude of causes for those codes no body will have a magic cure.
![](https://cimg9.ibsrv.net/gimg/www.jaguarforums.com-vbulletin/2000x897/screen_shot_2018_03_01_at_6_22_49_am_3a02e760e87a11ac9f7e13078ea5f11d93920f29.png)
This is a screenshot of my results when I enter "P0171 P0174" in the XF forum:
![](https://cimg5.ibsrv.net/gimg/www.jaguarforums.com-vbulletin/2000x1379/screen_shot_2018_03_01_at_6_24_14_am_6aa3958f433e5bb4326deec6fa636396e4064b32.png)
Could it be a problem with my account?
Last edited by wardo5757; 03-01-2018 at 06:42 AM.