• Also known as Powertrain Control Module (PCM) or Engine Control Unit (ECU)
• Monitors sensors in the engine bay that manage fuel-air mixtures and emissions
• Installation is best left to a professional technician

Your Nissan's Engine Control Module is in many ways the brainpower behind your whole engine management system. Also known as the ECU (Engine Control Unit) or PCM (Powertrain Control Module), this car part monitors the many sensors inside your engine bay that produce the energy your Nissan needs to operate properly.

The Engine Control Module controls the fuel mixture, manages ignition timing, oversees fuel pump operation, evaluates emissions performance, and so much more. In some vehicles, the module even manages other systems alongside its main tasks, including the cruise control, anti-theft systems, ABS, and body control module.

The Engine Control Module can weaken or fail for a number of reasons, including wiring problems. Other potential causes are exposure to excessive vibrations and heat, insufficient or excessive voltage, and general wear from corrosion and age over time. Full-blown Engine Control Module malfunctions are uncommon, while system problems within control modules are more commonplace. When these internal issues compound or are ignored for too long, you might need the entire Engine Control Module replaced.

Because engine control modules support and maintain so many of your Nissan's systems, detecting a failing one can be hard to do. For instance, your check engine light may illuminate — which could be caused by other components that have no relation to the Engine Control Module.

Other obscure indicators of a compromised Engine Control Module include reduced engine performance, engine misfires, or your vehicle might not start at all. However, the primary concern when a control module fails is that the systems it manages are likely not too far behind.

Are you able to replace a faulty Engine Control Module at home? We suggest leaving this replacement to a professional technician. Not only does installation consist of numerous complex steps, but the new Engine Control Module will need to be programmed for your car's specific model and year, VIN, engine, and more. Completing this installation requires special tools, navigation, and expertise so it should not be done by anyone other than a professional.

Buying the incorrect Engine Control Module can lead to damaging engine issues within your Nissan. Make sure you get one made especially for your Nissan by ordering genuine OEM components at Nissan Parts.

This Engine Control Module, part 237031VX9A, is compatible with Nissan Altima 2008-2013. See the What This Fits tab for more details.

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