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EDC16 / P0404 50

Read the instructions below then start the fault diagnostic procedure.

Symptom: Warning lamp lights. Performance loss.

  P0404 50


Exhaust Gas Recirculation Valve Malfunction

Fault symptom

Warning lamp lights.

Performance loss.

On-board diagnosis

Enable criteria:

Engine running.
Closed EGR valve.

Fault criteria:

The EGR valve is open when it was expected to be closed.

System reaction to a fault:

Limp Home, fuel limitation.
Regeneration of DPF prevented.

Diagnostic help

Diagnosis regards:

Mechanical fault in the component.

Functions in the diagnostic tool related to the fault:

Test value:
EGR Actuator
EGR Actuator Position
(See also description of readings/activations in diagnostic tool)