June 2021 Archives - UnderhoodService
Diesel Exhaust Fluid (DEF) Changes

Modern diesel exhaust systems are complex and they include multiple sub systems to keep exhaust clean.

10 Timing Belt Tips

Here are the some key installation and service tips to make your next timing belt job just a little easier.

Diagnosing Throttle-By-Wire Limp Modes

Throttle-by-wire allows engines to better utilize variable valve timing and direct injection for torque and power.

R1234yf Refrigerant Service

It is not a question of if but when you’ll have to deal with R1234yf refrigerant. Here’s what to expect.

ECM and PCM Calibration Numbers

Finding out if the vehicle has the latest version or calibration on a module is a required step.