C0131 08

C0131 08

Pressure sensor Circuit, Signal not Plausible

Fault symptom
- Warning lamp lights.
- Messages shown in SID.

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- Ignition ON.

Test 1
- Brake light switch not activated.
- Vehicle accelerating with engine power.

Test 2
- Vehicle speed more than 7 km/h.
- Acceleration more than 2 m/s2
- No TCS regulation.

Test 3
- Brake light switch activated.
- Retardation more than 5 m/s2.

Test 4
- Brake light switch not activated.
- No TCS regulation.
- Vehicle accelerating with engine power.

Fault criteria:
Test 1
- Pedal pressure exceeds 25 bar for more than 2.5 seconds.

Test 2
- Pedal pressure exceeds 50 bar for more than 2.5 seconds.

Test 3
- Brake light switch activated more than 5 times and pedal pressure less than 1.4 bar for more than 2.5 seconds.

Test 4
- Pedal pressure exceeds 20 bar.

System reaction to a fault:
- No ESP function

Diagnostic help

Diagnosis regards:
- Electrical fault in the component.

Functions in the diagnostic tool related to the fault:

Test value:
- Brake Light Switch
- Pedal Pressure
(See also description of readings/activations in diagnostic tool)