HELP! P2105 and U0300 codes after custom tune - Power Hungry Performance Forum

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HELP! P2105 and U0300 codes after custom tune

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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.

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Mon, March 12th, 2012, 07:37 PM

Jackpine Jackpine is offline

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Join Date: Nov 2008

Location: Among Elk, Deer and Javalinas on the Mogollon Rim in Aridzona

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If you're still having the problem at stock, then it's not the tune. I notice you have a CAI on your truck. What year is the truck? I'm guessing it's not a new model. CAIs on the 04-05 trucks especially can cause the engine to run lean.

Are the throttle body and MAF sensor clean?

And, even if the transmission was replaced 6 months ago, it could well be going bad again.

- Jack

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custom tune, p2105, slipping, tranny, u0300

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