E39 / P00C9 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Check Engine Performance loss.

P00C9 00

Fault symptom

Check Engine

Performance loss.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.

Battery voltage greater than 11 V.

Engine speed more than 50 rpm.

Fault criteria:

The control module's power supply to the solenoid valve short circuited to ground.

Fault handling:

Type III

(See section Fault handling III, "Other emission-related components and functions" for more information.)

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:

Fuel Rail Solenoid PWM

Activation:

Fuel Rail Solenoid PWM

(See also description of readings/activations in diagnostic tool)