F 450 4WD Super Duty V8-6.4L DSL Turbo (2008)
EGR Valve: Description and Operation
EXHAUST GAS RECIRCULATION (EGR) VALVE
Exhaust Gas Recirculation (EGR) Valve
The EGR valve is a variable position valve that controls the amount of exhaust that enters the intake manifold. The PCM controls the EGR valve which
operates between -100 and 100% duty cycles which cannot be viewed by a PID on a scan tool.
The EGR valve operation can be monitored by viewing the EGRVPA PID which displays the actual EGR valve position as a percentage.
