Technical Description
When the EGR valve (stepper motor) is actuated from the fully closed position toward the open position while the engine is running, EGR gas flows. The PCM checks how the EGR gas flow signal changes.
When the EGR valve (stepper motor) is actuated from the fully closed position toward the open position while the engine is running, EGR gas flows. The PCM checks how the EGR gas flow signal changes.