P0630 and U0422
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2nd Gear
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P0630 and U0422
So, my mileage has been going steadily down for a couple months. From about 17 to now, 12 MPG. My truck is a 2018 F150 with the 2.7. 4X4 crew cab. 6 inch lift and 35 inch tires. I got a check engine light today with P0630 and U0422. Any ideas?
Last edited by danoneal; Apr 16, 2023 at 03:24 PM.
Fleet Mechanic
Joined: Jan 2020
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?? Google the interweb with codes and F150. There are various good reading threads. A tune is one culprit, that's why I asked. Even changing the tires size in the computer causes it, and yours does have modifications, hard telling who has played in the computer. It might be easier to take to a shop with proper diagnosis equipment rather than start throwing parts at it. Good luck.
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Deep insight into P0630:
https://www.forscan.org/forum/viewtopic.php?t=8852
And U0422:
https://obd2pros.com/dtc-codes/u0422/
Are you the original owner?
It appears to me based on the 90 seconds of research that the first code has it's roots in the effort to change the tire size by telling the computer it's a different truck with a different OEM configuration--so the speedo will be correct.
The second code is the result of the lift. Some sensor is now in a cold, dark, unfamiliar place--or naked and alone in the open--and it is now afraid and can't talk to the computer like it used to.....
https://www.forscan.org/forum/viewtopic.php?t=8852
And U0422:
https://obd2pros.com/dtc-codes/u0422/
Are you the original owner?
It appears to me based on the 90 seconds of research that the first code has it's roots in the effort to change the tire size by telling the computer it's a different truck with a different OEM configuration--so the speedo will be correct.
The second code is the result of the lift. Some sensor is now in a cold, dark, unfamiliar place--or naked and alone in the open--and it is now afraid and can't talk to the computer like it used to.....
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