T8 / P0451 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 11 - 16 V. |
| Coolant temperature over 4°C. |
| Intake air temperature over 4°C. |
| NONE of the following DTCs must be detected: |
Fault criteria:
| Tank pressure alternates more quickly than that which can be caused by sloshing of the petrol. More than 15 pressure changes of more than 25 Pa for 5 s. |
Dependent:
System reaction to a fault:
| The control module uses a substitute value of 0 kPa. |
OK report:
| Fault criteria NOT fulfilled for 6 s. |
Fault handling:
| (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:
| (See also description of readings/activations in diagnostic tool) |
