After my truck warms up and runs a while it stumbles at cruising speed and it will also cut off when letting off of the accelerator. The codes that have come up on mine at first was code PO510 and also code PO440 and 446. I replaced the closed throttle positioning sensor I still have the problem. And only one time the PO110 code came up which is the intake air temp. sensor. I'm still having the same problem what should I do?
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