Engine Controls - Tests W/Codes - 6.5L Diesel: Introduction

The 6.5L light duty emission Diesel Electronic Control (DEC) system, electronically controls EGR system operation, Torque Converter Clutch (TCC) engagement, fuel control and fuel injection timing.

Most engine control problems are NOT computer related, but result from mechanical breakdowns, poor electrical connections, or damaged vacuum hoses. Before condemning the computer system, carefully perform visual and mechanical inspections. Failure to perform these inspections can result in lost diagnostic time.