06 F150 P0171/P0174 codes
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Joined: Mar 2008
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From: MD
06 F150 P0171/P0174 codes
Had another thread but I guess you can't change the thread title and it wasn't very imformative. Have some questions or maybe more of a rant.
Last year the CEL came on in my 06 F150 FX4 SCAB. Took it to autozone to pull the codes and it was the 0171 and 0174 lean conditions on banks 1&2. Came on here and looked at the, seemed like 500 threads about this lol, and decided to start from the beginning and clean the MAF as the fuel filter was less than 6mo old. Cleaned the MAF with electrical sensor cleaner and scrubbed it real good. 3mo go by and it comes on again. I cleaned the sensor a second time.
Fastforward 4 or 5 months later which was February/March timeframe and the CEL comes on again. So I start checking for vacumn leaks and can't find any so I took it into the dealer. Their solution was to replace the TB. So they do that and all is well for about 6mo. I went to a military school so it wasn't driven for a large chunk of that time.
Anyways, couple weeks ago the light comes on again, and I start hearing a ticking sound, sounded like a lifter to me, along with a pfft pfft sound which I guessed was exhaust manifold and turned out it was.
Anyways after 4 days of the tech not being able to figure it out, and running test after test they finally came up with that both front EGO sensors, essentially the upstream o2's, were not operating properly and guessed that with that and the exhaust manifold it had the whole system out of whack.
Now $1200 down between the TB and the sensors(the manifold was replaced under warranty) I hope it's finally good to hook.
Figure'd I would share as those codes have a ton of threads about them and it may help someone else. Essentially, skip the TB as a cause if you get these codes
because that ain't it. Good luck getting to the o2 though as I saw where it is and good luck getting your hand in there.
Last year the CEL came on in my 06 F150 FX4 SCAB. Took it to autozone to pull the codes and it was the 0171 and 0174 lean conditions on banks 1&2. Came on here and looked at the, seemed like 500 threads about this lol, and decided to start from the beginning and clean the MAF as the fuel filter was less than 6mo old. Cleaned the MAF with electrical sensor cleaner and scrubbed it real good. 3mo go by and it comes on again. I cleaned the sensor a second time.
Fastforward 4 or 5 months later which was February/March timeframe and the CEL comes on again. So I start checking for vacumn leaks and can't find any so I took it into the dealer. Their solution was to replace the TB. So they do that and all is well for about 6mo. I went to a military school so it wasn't driven for a large chunk of that time.
Anyways, couple weeks ago the light comes on again, and I start hearing a ticking sound, sounded like a lifter to me, along with a pfft pfft sound which I guessed was exhaust manifold and turned out it was.
Anyways after 4 days of the tech not being able to figure it out, and running test after test they finally came up with that both front EGO sensors, essentially the upstream o2's, were not operating properly and guessed that with that and the exhaust manifold it had the whole system out of whack.
Now $1200 down between the TB and the sensors(the manifold was replaced under warranty) I hope it's finally good to hook.
Figure'd I would share as those codes have a ton of threads about them and it may help someone else. Essentially, skip the TB as a cause if you get these codes
because that ain't it. Good luck getting to the o2 though as I saw where it is and good luck getting your hand in there.
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Joined: Apr 2009
Posts: 10,697
Likes: 14
From: In the fast lane from LA to Tokyo...
I'm happy to hear your issues were fixed!
The really crummy thing about dtc codes is sometimes they have to be chased with parts.
They do provide valuable info on where to start looking for the problem(s).
If people working on vehicles aren't well versed in trouble shooting protocols and have issues using the data base then more parts may be used than necessary.
The really crummy thing about dtc codes is sometimes they have to be chased with parts.
They do provide valuable info on where to start looking for the problem(s).
If people working on vehicles aren't well versed in trouble shooting protocols and have issues using the data base then more parts may be used than necessary.