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

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

1. 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 P2227 displayed? (Current malfunction)

   Yes  : Go to  2.

   No  : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

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.