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EDC16 / P0400 12

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE lamp on.

  P0400 12


EGR Actuator Circuit, Short to Ground

Fault symptom

CHECK ENGINE lamp on.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.
The control module output is not active.

Fault criteria:

Output short circuit to ground for more than 0.4 s.

Dependent:

P2279 5B

System reaction to a fault:

EGR turned off in case of fault.

Checking the wiring harness

Jiggle the wiring harness at several points to detect intermittent breaks or short circuits. Check also the connector for oxidation or loose pins.

Diagnostic help

Diagnosis regards:

Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:

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