Ford F-250 Diesel: Why is My Check Engine Light On?
Here is what you need to do if your Ford F-250 or F-250 Super Duty's check engine light goes on.
This article applies to the Ford F-250, F-350 Diesel Super Duty (2005-2014).
The F-350 6.0 Liter Diesel trucks have 3 drivetrained controlled computers: the fuel-injection control module, power train control module, and the transmission module. If the check engine light is on, one or more of the modules has found an error in the system. In order the fix the issue, you must read the codes. Reading these instructions will help you find symptoms to figure out if you have a serious problem.
Step 1 - Plug the scan tool connector
Find the port of the diagnostic connection under the driver’s side of the dashboard, which is 1/2-inch by 2 inches wide. After removing the protective cap, plug the scan tool connector into the port.
Step 2 - Write down the codes
Read the instructions on the scan tool's operator manual to run a test on all 3 modules. Write down the codes during each stage of the test on a notepad. These codes will determine the problem to help you determine the best steps to take.
Step 3 - Re-install the protective cap
Remove the scan tool's connector from the port found under the dashboard. Reinstall the protective cap found on the diagnostic connection port.
Step 4 - Refer to your owner's manual
Check your owner's manual for the codes, match the codes you wrote down, and find out what the source of the problem is,
Pro Tip
A loose gas cap is a common reason the engine light is on. Complete research or consult a professional before purchasing a scan tool to make sure it matches your Ford truck's software. If you are unable to get a scan tool, bring it to your dealership or local auto body shop to have the code scanned.
Featured Video: Scanner in Action
Related Discussions
- Check Engine Light - Ford-trucks.com
- Diesel - Ford-trucks.com
- Owner's Manual - Owner.ford.com
