SAAB WIS ONLINE

P0101

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE. Loss of performance.

P0101


Mass Air Flow Circuit. Performance Problems.



Fault symptoms


CHECK ENGINE.

Loss of performance.


On-Board Diagnostics

Type of diagnosis:


- Continuous.


Enable criteria:


- Battery voltage should be 10.2-15.8 V.

- P0102, P0103, P1636 or P1637 should not be detected.

- Engine speed should be 1500-4500 rpm.

- Rpm changes between two measurements should not exceed a difference of 40 rpm.

- Intake air temperature should be 20-90 °C.

- Injection quantity should be 15-40 mm 3 /C.

- The difference between two injectors must not exceed 3mm 3 /C and EGR flow is 0%.


Fault criteria:


- The difference between calculated and actual air mass/combustion exceeds 30%.


Dependents:


- TBD.


System reaction to a fault:


- The control module will continue to work with a substitute value of 1200 mg/cyl for the mass air flow sensor. The following limitations apply: Pedal position sensor adjustable to max 40 %, fuel quantity max 30 mm 3 /combustion and EGR and boost pressure control are switched off.


OK report:


- Fault criteria not fulfilled.


Fault handling: (See section Fault handling III, other emissions-related components and functions for more information)


- Type III.


Diagnostic help

Fault diagnosis concerns a check of the intake system.

Functions in the diagnostic tool related to the fault:


- Read value: Airmass / Combustion


See also description of read value under "Read Values" menu for more information.