Ford F-250: How to Replace PCM

The Powertrain Control Module (PCM) can be altered to improve performance. The PCM may be the cause of performance or starting problems on your Ford Super Duty. Changing and/or modifying the PCM is easier than you think and could save you money.

By Scott Deuty - December 22, 2014

This article applies to the Ford Super Duty (2005-2014).

The PCM is the brain of your Super Duty that houses the central computer and essentially controls everything. The PCM is a complex and costly item, so only replace it after doing some research and eliminating other possible causes of failure. You will need to locate the PCM and Strategy Codes for your module as well as service bulletins that may have been issued for your vehicle. The Strategy Codes are located on the PCM connector.

Materials Needed

  • Screwdriver
  • Sockets

Step 1 - Locate the PCM

Locate the PCM and record the module and Strategy Code numbers.

Figure 1. Locate the PCM and record the numbers.

Step 2 - Check the new module

Purchase the new module based on your findings. Don’t install the new module without comparing it with the existing module. The connectors and mounting locations should match. Most places will not accept a module as a return item once it has been plugged in.

Figure 2. Check the new module.

Step 3 - Disconnect the battery cable

Disconnect the battery cable from the negative side of the battery.

Figure 3. Disconnect the battery.

Step 4 - Switch modules

Unbolt and disconnect the existing module. Compare it one more time before installing the new module.

Figure 4. Remove the old module and install the new one.

Pro Tips

  • There is a lot of information on the internet regarding the PCM module. Note that the connector is protected by silicon. Cleaning the connector is essential to proper operation once the installation is complete.
  • Certain solvents can damage the PCM. Reusing the PCM bolts can also cause issues which is why the module is reinserted with duct tape in certain situations. It is strongly recommended that you read the provided references and work with the PCM module manufacturer’s recommendations.

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