Fault code P0409

After sales description of the fault:
   EGR valve : Valve detected jammed closed during the ECU switching
   to dormant mode phase

Description of the diagnostics:
   Sticking of the EGR valve in the low position detected by the
   impossibility of reaching 90 % in 1 second

Conditions of activation of the diagnostics:
   Just after switching off the engine, without restarting within 1 min

Conditions of disappearance of the fault:
   Start the engine and let it run for 4 min, then stop the engine and wait
   for the engine ECU to go into sleep phase for 1 min

Main customer complaints likely:
   Starting problem
   Jerking/stalling
   Lack of power
   Suspect areas EGR valve
   Electrical harness
   Connectors
   
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Fault code P0489

After sales description of the fault code:
   EGR valve : Position incorrect (too open)
   Description of the diagnostics The position measured is less than the reference by more than 15 % for 5 seconds

Conditions of activation of the
diagnostics:
   engine running

Conditions of disappearance of the fault:
   Driving for 5 minutes remaining under an engine speed of 4000 rpm at half load

Down-grade modes if fault present Closing of the ECU valve:

   Irreversible deactivation of the vehicle speed limiter
   Irreversible deactivation of the vehicle cruise control
   Deactivation of taking account of the tight spot information
   Switching of the turbocharging pressure regulation to controlled mode
   Switching to fuel "normal reduced flow" mode
   Deactivation of the request for regeneration of the particle filter from the diagnostic tool
   Deactivation of the "easy-move" (electric parking brake) functionality
   Function for limitation of the static torque for the protection of the gearbox

Switching on of the warning light and/or warning message
   Warning lamp MIL
   Warning lamp SERVICE
   
Main customer complaints likely Jerking/stalling
   Smoke from the exhaust
   Noise
   Lack of power
   Starting problem
   Problem with automatic restarting of the internal combustion engine

Suspect areas:
   EGR valve
   Electrical harness
   Connectors