PCM

Updated: June 3, 2025

Definition

Powertrain Control Module (PCM) is the main computer that controls the engine and transmission systems, managing fuel injection, ignition timing, emissions, and transmission shifting.

Category: Specific Control Modules

Specialized electronic control units that manage specific vehicle subsystems

The Powertrain Control Module integrates engine and transmission control into a single electronic unit, optimizing performance, fuel efficiency, and emissions through sophisticated software algorithms.

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Related Terms

ECM

Specific Control Modules

Engine Control Module (ECM) is the primary computer that controls engine operation, managing fuel injection, ignition timing, emissions control, and engine protection systems.

APIM

Specific Control Modules

Accessory Protocol Interface Module (APIM) is an electronic control unit that manages vehicle infotainment systems, connectivity features, and communication protocols between various vehicle systems.

TCM

Specific Control Modules

Transmission Control Module (TCM) is a specialized electronic control unit that manages automatic transmission operation, controlling shift points, torque converter lockup, and transmission protection strategies.