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.
Powertrain Control Module
Powertrain Control Module (PCM) communicates with Passive Anti-Theft System (PATS) control module to enable or disable starting of engine. PATS and PCM communicate over the Standard Corporate Protocol (SCP) communications network. PATS and PCM become a matched set when first installed together. After initially sharing data PATS and PCM use sophisticated messages in order to prevent theft and will not function in other vehicles. Shared security Identification (ID) and vehicle ID codes are retained even if battery is disconnected. If PCM requires replacement, PCM MUST be reprogrammed. See POWERTRAIN CONTROL MODULE under REMOVAL & INSTALLATION.
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.