Drive Cycle H

DTC	Item	Condition
P0071	AMBIENT AIR TEMPERATURE SENSOR CIRCUIT "A" RANGE/PERFORMANCE	6 hours have elapsed since ignition switch is OFF under a completely warmed up condition. For models with block heater, at least 6 hours must have elapsed without operating the block heater.
P0116	ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT RANGE/PERFORMANCE	6 hours have elapsed since ignition switch is OFF under a completely warmed up condition. For models with block heater, at least 6 hours must have elapsed without operating the block heater.
P0451	EVAP SYSTEM (CPC) PRESSURE SENSOR/SWITCH CIRCUIT RANGE/PERFORMANCE	60 seconds have elapsed since ignition switch is OFF.
P050A	COLD START IDLE CONTROL SYSTEM PERFORMANCE	-
P050B	COLD START IGNITION TIMING PERFORMANCE	-
P2431	SECONDARY AIR SYSTEM AIR FLOW/PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE BANK 1	-

Diagnostic procedure: 

1. With the ignition switch ON (engine stopped), read the value in «Coolant Temp.» and «Intake Air Temp.». Ref. to ENGINE (DIAGNOSTICS) (STI)>Subaru Select Monitor>OPERATION>DISPLAY CURRENT ENGINE DATA (NORMAL MODE) .
2. If the values from step  1) satisfy the following conditions, idle the engine for two minutes or more.

   Condition:

   |Engine coolant temperature - Intake air temperature|= 5°C (9°F)

   NOTE:

   • If the conditions are not satisfied, turn the ignition switch to OFF and wait until the parameters are satisfied.
   • Do not move the gear shift lever from neutral position during idling.
3. Read the temporary code using the Subaru Select Monitor or general scan tool. Ref. to ENGINE (DIAGNOSTICS) (STI)>Read Diagnostic Trouble Code (DTC)>OPERATION .