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ESP / C0121 04

Read the instructions below then start the fault diagnostic procedure.

Symptom: ABS warning lamp on Message appears in display. Steering column lock not working.

  C0121 04


Valve Relay Does Not Close

Fault symptom

ABS warning lamp on

Message appears in display.

Steering column lock not working.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Ignition ON.
Valve activated

Fault criteria:

When voltage on output is below 2 V.

System reaction to a fault:

No ABS function
No TCS/ESP function

Diagnostic help

Functions in the diagnostic tool related to the fault:

Test value:
Valve Feed
Activation:
Valve Feed
(See also description of readings/activations in diagnostic tool)