DTC P2227: Barometric Pressure Sensor "A" Circuit Range/Performance: Notes

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DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

NOTE:
After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Basic Diagnostic Procedure> PROCEDURE .

CHECK DTC .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (diag)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC other than P2227 displayed? (Current malfunction)

Yes : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Diagnostic Trouble Code (DTC)>LIST .

No : Go to 2.
CHECK DATA MONITOR .
Using the Subaru Select Monitor, read the values of [Barometric Pressure] and [Mani. Absolute Pressure] to compare with actual atmospheric pressure.

NOTE:
For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (diag)> DATA MONITOR .

Is the difference with the actual atmospheric pressure 8 kPa (60 mmHg, 2.4 inHg) or more?

Yes : Replace the part that showed larger deviation from the actual atmospheric pressure than the other.
- If deviations in value for [Barometric Pressure] is larger: Replace ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM) .
  NOTE:
  The barometric pressure sensor is built into the ECM.
- If deviations in value for [Mani. Absolute Pressure] is larger: Replace the manifold absolute pressure and intake air temperature sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>MANIFOLD ABSOLUTE PRESSURE AND INTAKE AIR TEMPERATURE SENSOR .
No : Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.