E39 / P0236 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Performance loss.
Charge Air Absolute Pressure Sensor Circuit. Performance Problem.
Fault symptom
Malfunction Indicator Lamp
Performance loss.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 10 - 18 V. |
| NONE of the following DTCs must be detected: |
| P2227, P2228, P2229, P2230 |
| Coolant temperature between -7°C and 125°C. |
| Intake air temperature between -20°C and 125°C. |
| Battery voltage must be between 10 - 18 V. |
| Ignition OFF for more than 5 seconds. |
| The following diagnostic trouble codes may not be generated: |
| P2227, P2228, P2229, P2230 |
Fault criteria:
| The boost pressure sensor signal is lower than 50kPa or higher than 105kPa. |
System reaction to a fault:
| Limp home - Only basic charge pressure |
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:
| Charge Air Absolute Pressure |
| Charge Air Absolute Pressure Sensor |
| (See also description of readings/activations in diagnostic tool) |
