Limp mode shuts off after a couple seconds?

Tiny
CHRISTOPHER JERLA
  • MEMBER
  • 2012 FORD F-150
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 230,000 MILES
My F150 starts but will shut off after a couple seconds. If I throttle up I can keep it running, sometimes I’m able to drive just fine and sometimes it goes into limp mode. Code for evap p0453 appeared. So far replaced purge valve, fuel tank sensor, and even the charcoal canister. Code is still there and codes for random misfire, misfire on 1 and 2. I’ve also replaced plugs, coils, VVT solenoids, and mass airflow sensor recently. I just ordered o2 sensors and fuel injectors. I noticed if do a battery reset on my scanner the truck runs perfect for like five minutes before going back to limp mode. Please help.
Tuesday, April 1st, 2025 AT 10:21 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Most of the time limp mode will kick in due to a dirty throttle body, have you serviced it recently?

Here are guides to help us see what's going on:

https://www.2carpros.com/articles/reduced-power-limp-mode

Here is a guide to help you with the service and instructions for your truck in the images below.

https://www.2carpros.com/articles/throttle-actuator-service

Clear the codes once completed. Check out the images (below). Please let us know what happens.

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Wednesday, April 2nd, 2025 AT 12:43 PM

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