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2009 F-150 5.4 3v P0345 and P0349

 
Old 02-07-2019, 10:43 AM
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Default 2009 F-150 5.4 3v P0345 and P0349

Well decided to remove the cam phaser lockouts in my 09 F-150 with the 5.4 3v. While I was in there I replaced VCT solenoids. When I started it up and took it on a drive I thought it was a new truck! The thing I need some advice on is, I'm still getting the codes P0345 and P0349. I know the engine is timed correctly and the fingers on the cam phaser were not bent. I read about the alternator having interference issues but I unplugged it and cleared the codes then started the truck and it went away. I then shut it off and restarted it with the alternator still unhooked and the codes came back. The cam sensors are new but I did notice the plug that plugs into the sensor was replaced at one time before I owned the truck so I'm thinking the wires could have gotten crossed. Any advice from you guys would be very much appreciated! Thanks!
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Old 02-07-2019, 10:57 AM
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Sensor A bank 2.. check wires. both DTC's point at that sensor.
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Old 02-07-2019, 11:20 AM
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Iíll take a look. Thanks!

Last edited by jaredmiller01; 02-07-2019 at 11:20 AM. Reason: Typo
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Old 02-07-2019, 11:58 AM
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I have those same exact codes on my 2005 5.4L 3V.
I also sometimes get the P0021 (Pending) that comes and goes away on its own.

For the life of me, I couldn't figure it out why I was getting the codes.
I've checked the wiring, the sensors, the blades on the cam phasers, the alternator, but nothing.
Took it to a couple of reputable mechanics:
1 wouldn't even touch the engine because of the well known timing problems (even though this one didn't give hard codes of P0021 & P0022).
1 recommended replacing the entire PCM (which I did, and $500 later, I still have the same codes)
1 recommended replacing the whole engine (which I then finally acknowledged that keeping the engine is going to cost me more money down the line)

I can't pass emissions test with a CEL, so I gave up and bought the 2016 5.0L


However, maybe you'll have much better luck in finding the problem.

Last edited by adanvjr; 02-07-2019 at 12:09 PM.
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Old 02-07-2019, 09:35 PM
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I changed the wires and it fixed it! Iím just trying to keep this one going until I can trade up to a more dependable truck. Mine has a hesitation that I canít figure out. Itís in the meat of the torque curve. It seems like if youíre light on the pedal it does it and when you really give it to her it doesnít. Iím not sure whatís going on. Iíve replaced all timing components, injectors, COPs, spark plugs and front O2 sensors and it still does it!!
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Old 02-08-2019, 05:36 AM
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clean the throttle body and MAF sensor with the proper cleaners... disconnect the neg from battery while doing it. remove TB for cleaning.. after all is done re-connect and fire her up.. let idle for 5 mins and then complete a drive cycle.
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Old 02-08-2019, 11:13 AM
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Will do. Probably be the beginning of the week. After I try that Iíll report back.
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Old 02-08-2019, 11:44 AM
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Originally Posted by jaredmiller01 View Post
Will do. Probably be the beginning of the week. After I try that Iíll report back.
Nice job on finding the wires and the fix. Have a great weekend buddy.
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Old 02-09-2019, 08:45 AM
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Well I got another question for you guys LOL. So I changed my spark plugs for the heck of it Thursday and I took it on a test drive. Wednesday night it ran great. When cruising you can feel a slight lag. I know itís not the TC, because if it was that it would shudder a little more and a lot harder. Itís like a split second lag that is rhythmic. It also has code P2096 present. Any thoughts?

Last edited by jaredmiller01; 02-09-2019 at 08:48 AM. Reason: Typo
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Old 02-09-2019, 10:07 AM
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02 sensor bank one .. post cat. could pull it and clean it up and reinstall.. give that a shot.
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