GM has issued a recall for certain examples 2021 to 2023 Chevy Trailblazer due to an issue related to the engine control module.

A faulty or malfunctioning transmission can trigger the check engine light for a handful of reasons, including things like an overheating gearbox or issues with the transmission control module (TCM).

GM has issued a recall for certain examples of the 2020 to 2023 Buick Encore GX due to an issue related to the crossover's engine control module.

The Engine Control Module (ECM) is the computer responsible for controlling the engine. The ECM communicates with other vehicle control units via a communication bus.

CarMD’s latest study looks at the most common check-engine light repairs and their average costs over the previous calendar year, then ranks the results.