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  1. Mar 2, 2023 · An ECM, or engine control module, is a computer that controls the engine. A PCM, or powertrain control module, is a computer that controls the transmission and engine in order to optimize fuel economy and power. The two systems are similar, but the ECM focuses specifically on the engine while the PCM regulates both the engine and transmission.

  2. www.cars.com › articles › what-is-a-pcm-429615What Is a PCM? - Cars.com

    Nov 7, 2020 · The PCM receives signals from sensors that measure air flow into the engine and out the exhaust, the coolant temperature, how far down the accelerator pedals is, the speed at which each wheel is ...

  3. What is Powertrain Control Module? The PCM is known as the brain of the vehicle. The PCM is also known as the engine control module (ECM). It is a self-propelled control system installed in your car. The main function of the PCM is to collect data from different parts and sensors of your vehicle engine.

  4. Dec 10, 2019 · The amount of data the PCM has to process and the number of actions it can take to adjust and fine-tune the engine’s operation increases with every new car model. On recent vehicles, the PCM can independently control the spark timing advance, each intake’s opening, and exhaust valves.

  5. Jul 22, 2024 · The powertrain control module, or PCM, is the brain of your car's powertrain. The PCM integrates the functions of the engine and transmission control modules. This improves performance, fuel ...

  6. Oct 17, 2024 · Most of the codes relating to the PCM begin with P06. Engine Performance Issues. A faulty PCM will send the wrong signals to the powertrain, which affects engine timing, fuel injection, and overall engine management. This could come to fruition in the form of misfires, rough idling, stalling, and lackluster acceleration.

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  8. Jun 27, 2022 · The powertrain control module (PCM) controls the powertrain. Some of the parameters it monitors include engine speed, coolant temperature, and throttle position. The PCM uses data from the different sensors to ensure optimal operation. For example, it uses data from oxygen sensors to determine how much fuel the engine needs.

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