February 2022 Archives - UnderhoodService
What Caused The Turbo To Fail?

Up to 50% of turbocharger failures are due to oiling problems.

Rough Running GM Vehicle

This condition may be caused by an internal circuit board fault within the throttle body.

Mode $06 Misfire Diagnosis

Understanding why ‘Mode $06’ was developed and how it works to identify misfires.

Exhaust Gas Recirculation Operation and Diagnostics

Since exhaust gas does not burn, this lowers the combustion temperatures and reduces NOx emissions from the engine.

Should You Install Customer-Supplied Parts?

Sometimes customers want to believe you’re just out to get them, but there are legitimate reasons behind refusing.

Ford Illuminated Malfunction Indicator Lamp

Replace the crankcase pressure sensor/tube assembly and reprogram the PCM.

Understanding Stop/Start Charging and Starting Systems

The problem may not have been caused by a complicated reason, something simple may have caused the system not to work.

Lost Or Stolen Key GM Vehicles

If the customer has requested to have the keys changed to a different key cut, use the procedure provided.

GM Active Fuel Management System Service

The AFM activation and deactivation are controlled by the Valve Lifter Oil Manifold or VLOM.

‘CARBAGE’ Options

There are two types of carbage. The first is called the ‘collector’ and the second is called a ‘dumpster’.

Read Your Copy of the February Digital Edition Now

The February issue includes technical and management content and is free to download and read.