T8 / P023D 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
Limp home
Manifold Absolute Pressure and Charge Air Absolute Pressure, Plausibility Fault.
Fault symptom
Malfunction Indicator Lamp
Limp home
On-board diagnosis
Type of diagnosis:
Enable criteria:
| NONE of the following DTCs must be detected: P0107, P0108, P0237 and P0238. |
| When these conditions are fulfilled, check the difference between both sensors. |
Fault criteria:
| Pressure difference between sensors is more than 12 kPa. |
Dependent:
System reaction to a fault:
| Torque limited to max. 170Nm. |
| Boost pressure adaption is blocked and reset. |
| Correction of mass air flow/combustion for fuel calculation is blocked. |
| Limited acceleration and idle function. |
| Secondary air pump not active, if fitted. |
OK report:
| Fault criteria NOT fulfilled for 2 s with engine running. |
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 faulty sensor. |
Functions in the diagnostic tool related to the fault:
| • | Manifold absolute pressure sensor |
| • | Absolute pressure sensor, charge air |
