The powertrain control module (PCM) in your Jeep Wrangler acts as your engine's brain. Here's where it can cause problems, and how to fix them.

Read the Chevy High-Performance tech article on How to Program an OBD-II Powertrain Control Module.

Almost 31,500 units of the 2024 model year Mazda CX-90 and 2025 model year Mazda CX-70 have been hit with a safety recall stateside. Improper powertrain and engine control module software may ...

25V239000 Ford Motor Company (Ford) is recalling certain 2025 Explorer vehicles. The powertrain control module (PCM) may reset while driving, which can damage the park system or cause an engine stall.

Jaguar Land Rover North America, LLC (Land Rover) is recalling certain 2020-2021 Land Rover Defender vehicles equipped with 6-cylinder engines. The Powertrain Control Module (PCM) may unexpectedly ...

The affected vehicles did not have the Powertrain Control Module (PCM) updated as intended. Therefore, the Canister Purge Valve (CPV) may malfunction, possibly causing excessive vacuum in the fuel ...

The remedy was a software update for the powertrain control module (PCM), which we had performed in December 2023. Presumably, our truck now produces its optimal levels of emissions.

GM has issued a service bulletin for the 2020 to 2022 Chevy Bolt EV and 2022 Chevy Bolt EUV describing reprogramming of the Hybrid Powertrain Control Module 2.

“The powertrain control module software may cause an incorrect fuel mixture condition in the engine and result in an engine stall," according to one document posted recently on the NHTSA site.

The fix: Dealers will replace the powertrain control module on affected vehicles, free of charge to owners. How to contact the manufacturer: The recall is expected to begin Sept. 28.