T8 / P0238 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
Charge Air Absolute Pressure Sensor Circuit. Short to B+.
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Limp home
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 11 - 16 V. |
Fault criteria:
| When the voltage on the input exceeds 4.70 V for more than 1 s. |
Dependent:
System reaction to a fault:
| Torque limited to max. 140 Nm. |
| Boost pressure adaption blocked. |
| The control module uses a substitute value that is a function of atmospheric pressure, engine speed and damper area. |
OK report:
| When fault criteria NOT fulfilled for 2 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:
| • | Absolute pressure sensor, charge air |
| (See also description of readings/activations in diagnostic tool) |
