P023D

P023D 00
Manifold Absolute Pressure and Charge Air Absolute Pressure, Plausibility Fault.

Fault Symptom
Malfunction Indicator Lamp
Limp home

On-Board Diagnosis
Type of diagnosis:
Once per driving cycle.

Enable criteria:
Ignition ON.
NONE of the following DTCs must be detected: P0107, P0108, P0237 and P0238.
Vehicle speed 0 km/h.
0 rpm.
When these conditions are fulfilled, check the difference between both sensors.

Fault criteria:
Pressure difference between sensors is more than 12 kPa.

Dependent:
None

System reaction to a fault:
Torque limited to max. 170Nm.
Purge blocked.
Boost pressure adaption is blocked and reset.
Correction of mass air flow/combustion for fuel calculation is blocked.
Limited acceleration and idle function.
Cruise control blocked.
Secondary air pump not active, if fitted.

OK report:
Fault criteria NOT fulfilled for 2 s with engine running.

Fault handling:
Type III (See Description of On-Board Diagnostics/Fault handling III, "Other emission-related components and functions" for more information.) Fault Handling III, Other Emission-Related Components and Function

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:
Test value:
- Manifold absolute pressure sensor
- Absolute pressure sensor, charge air

And external barometer.