Joined: Jan 2019

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I have a 2005 5.4 XLT 4WD. I have 2 codes which are P0340 and P0344. I replaced both sensors and codes are still popping up, I cleared them to and they came right back. Please respond if you have any information on what could be the cause. Thank you.

Joined: Oct 2018

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From: Maysville KY

Joined: Jan 2015

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Joined: Jan 2019

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I don’t believe the timing has ever been replaced or checked from the previous owner. And I don’t know any symptoms because the codes have been on the truck sense I bought the truck. And truck has 280,000 miles, she’s old but I really good running truck.

Joined: Jan 2019

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And by “Timing job” are you referring to the timing chain?

Joined: Jan 2015

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Yes, well all of the timing components. Chains, tensioners,guides, phasers, cvt solenoids. Common problem on these trucks it is a pretty involved job. With those miles I would probably look into a reman engine. But to diagnose it you need a scan tool to see if timing is actually off then take off the front cover to see exactly what happened.