Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
ECM Replacement
If the engine control module (ECM) is replaced, the following procedures must be performed:
- Connect a scan tool to the vehicle and access Service Programming System (SPS).
- Before removing the old control module, perform the SPS function Prepare Control Module for Removal.
- Vehicle OFF, replace the ECM. Refer to Engine Control Module Replacement .
- Perform the SPS function Engine Control Module - Programming and follow the on-screen instructions.
- Perform the SPS function Engine Control Module - Configuration & Setup and follow the on-screen instructions. On the screen Control Module - Configuration and Setup Function(s), select both control module Configuration/Reconfiguration and the appropriate control module Setup.
- Clear DTCs after completing the programming procedure.
- Vehicle ON, engine running.
- If the SPS function Prepare Control Module for Removal could not be performed, perform the following:
Engine Oil Life Remaining. When available, use a scan tool to reset the Engine Oil Life back to the original percentage recorded before the module was replaced.
The Prepare Control Module for Removal function can only be performed when communication with the old control module is still possible.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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