Modern cars rely on a dense web of sensors to manage everything from fuel delivery to collision avoidance, and when one fails ...

As the name suggests, oxygen sensors in a car’s exhaust system sniff for oxygen, the presence of which indicates incomplete combustion and unchecked pollution. This can trigger the check engine light.

A service update has been issued for certain 2021 model-year GM trucks and SUVs over an issue related to the vehicles’ engine manifold pressure sensor. The problem: affected GM trucks and SUVs may ...