Service function guideEGR Valve Adaptation

This guide covers the complete process of cleaning or replacing an exhaust gas recirculation (EGR) valve and then performing the adaptation or relearn procedure that teaches the engine control module (ECM) the valve's closed and open positions. It is written for working mechanics and experienced DIYers who already understand basic engine management and have access to a scan tool with bidirectional controls. You will learn how the EGR system operates, when adaptation is required, how to prepare the vehicle safely, and how to execute the step-by-step procedure across common valve types. By the end, you will be able to verify a successful adaptation, diagnose failures, and apply proper aftercare so the repair lasts.