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. 170 Nm.
- 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 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:

Test value:
- Manifold absolute pressure sensor
- Absolute pressure sensor, charge air
- And external barometer.