Most drivers probably don't know what a transmission valve body is, but it's an important part of your car that needs to stay in top shape.

You'll need to understand how a turbocharger works to appreciate the blowoff (or recirculating) valve.

Evaporative emission control systems (EVAP) are used in cars' fuel systems to prevent gasoline fumes from leaking into the atmosphere. The EVAP system runs diagnostics for possible fuel vapor leaks ...

Due to the constant flow of air, the valve becomes clogged over time and needs cleaning. A clogged valve will result in several symptoms indicating that the idle air control valve is not functioning ...

GM is covering the repair costs of transmission control valve problems for over a half-million full-size trucks and SUVs for 15 years or 150,000 miles.

At the center of the issue is a potential failure in the transmission control valve body, which manages hydraulic circuits for gear shifts. This failure can cause a momentary rear-wheel lock-up.

Faulty transmission control valve can fail and cause rear wheels to lock up, increasing risk of crash, according to General Motors.