E39 / P0238 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Performance loss.
Charge Air Absolute Pressure Sensor Circuit. Short to B+.
Fault symptom
Malfunction Indicator Lamp
Performance loss.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 10 - 18 V. |
Fault criteria:
| When the signal on the control module input corresponds to pressure greater than 121.4 Pa for more than 4 seconds. |
System reaction to a fault:
| Limp home - Only basic charge pressure |
OK report:
| Fault criteria NOT fulfilled. |
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) |
