How do you reset the computer (PCM) in a Ford diesel truck?

My engine’s been jerky and inconsistent for a week or so. I had everything checked out mechanically, so there must be an issue with the ECU. What’s the best way to reset the computer in my Ford diesel truck?

Joshua Levy · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Computers facilitate everything in our cars, from the engine and air conditioning to airbags and brakes. But, sometimes, they get a little out of whack. Luckily, you can follow these steps to reset the computer in your Ford diesel truck and get things back into working shape:
  • Start by turning off your car and disconnecting both battery cables.
  • From there, get into the driver’s seat and turn the ignition to the Accessory position.
  • Leave it in the Accessory position for 20-30 minutes.
  • Then, remove your key and reconnect the battery cables. Your Ford truck’s computer has been reset!
Hopefully, these steps can help you get everything back to normal. But if you’re still having trouble, bring your car to a professional or invest in a code reader so you can properly diagnose the issue.
While you’re waiting for your computer to reset, take a minute to save on car insurance with
. A licensed broker, the Jerry app helps users save an average of $879 a year on car insurance. Just download the app and answer a few questions. Jerry will help you compare personalized quotes from over 50 top providers like Progressive and Nationwide for free.
View full answer 
Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.

Join 4M+ members in lowering their car insurance

Easiest way to compare and buy car insurance

No long forms
No spam or unwanted phone calls
Quotes from top insurance companies
Find insurance savings