T8 / P2121 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general) Limp home Message appears in display.

P2121 00

Fault symptom

Fault indicator lamp (for further information see WIS Fault diagnosis, general)

Limp home

Message appears in display.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

When the ECM is awake, diagnosis is active (even with the ignition off).

Fault criteria:

When input voltage is outside range 0.5 - 4.7 V.

Dependent:

None

System reaction to a fault:

Limp home

OK report:

Fault criterion not fulfilled and vehicle speed over 0 km/h for more than 60 s.

Fault handling:

Type III

(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:

•	Pedal Position Sensor 1

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