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.
Pcm Reprogramming
If a new PCM is being installed, it MUST be reprogrammed with new software and calibrations. Refer to SERVICE PROGRAMMING SYSTEM PASS-THRU PROCEDURE for reprogramming procedures. The PCM may be damaged if the reprogramming process is interrupted. Make sure scan tool is connected securely to the DLC and vehicle battery has a sufficient charge. Make sure the new PCM has the correct VIN and vehicle options.
After reprogramming the PCM, the PCM will have to learn the crankshaft notch variation for misfire diagnostics. Refer to CRANKSHAFT POSITION VARIATION LEARN PROCEDURE .
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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