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T8 / P0551 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: No load compensation for power steering. Higher idling speed.

  P0551 00


Power Steering Pressure Switch Performance Problem

Fault symptom

No load compensation for power steering.

Higher idling speed.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Battery voltage must be between 11 - 16 V.
Engine running.

Fault criteria:

Status change for the power steering pressure switch has occurred for a duration of 600 s when vehicle speed has been higher than 50 km/h (31 mph).

Dependent:

P0501

System reaction to a fault:

Control module continues working with the higher idling function.

OK report:

Status change for the power steering pressure switch has occurred.

Fault handling:

Type III without Check Engine.
(See section Fault handling III, "Other emission-related components and functions" for more information.)

Checking the wiring harness

Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:

Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:

Test value:
Power Steering Pressure Switch

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