Fault Conditions

Manifold Absolute Pressure Sensor Circuit. Short to B+.







Fault symptoms
- CHECK ENGINE.
- Engine speed drops slower than normal when accelerator pedal is released.
- Misfiring can occur before trouble code is generated.

On-Board Diagnostics
Type of diagnosis:
- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:
- Engine running.

Fault criteria:
- Voltage higher than 4.815 V for more than 10 s.

Dependents:
- None.

System reaction to a fault
- Purging blocked. Correction of air mass/combustion for fuel calculation blocked.
- Charge air adaptation blocked and zeroed.

OK report:
- P0106 Test 1 and Test 2 performed once and fault criteria not fulfilled. Fault criteria for P0107 or P0108 not fulfilled.

Fault handling: Fault Handling III, Other Emission-Related Component & Function
- Type III.

Diagnostic help
Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.
Functions in the diagnostic tool related to the fault:
- Pressure sensor value, unit kPa. The value should correspond with the other two pressure sensors when the engine is stationary. Accepted difference is 10 kPa.

For information, Tech 2 Menu Structure, DTC Menu, Read Value, Activate, Sys Info

Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multi meter, diagnostic tool or test lamp during the check.

Proceed to Diagnostic Procedures Checking the Sensor's Grounding