2022 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE

Inspection Mode H

DTC Description & trouble part Condition Number of driving cycles on the detecting condition
P0071 AMBIENT AIR TEMPERATURE SENSOR CIRCUIT "A" RANGE/PERFORMANCE
  • 6 hours or more 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.
 2
P0111 INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT RANGE/PERFORMANCE BANK 1 2
P0116 ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT RANGE/PERFORMANCE 2
P0196 ENGINE OIL TEMPERATURE SENSOR "A" RANGE/PERFORMANCE 2
P050A COLD START IDLE CONTROL SYSTEM PERFORMANCE - 2
P050B COLD START IGNITION TIMING PERFORMANCE - 2
P2183 ENGINE COOLANT TEMPERATURE SENSOR 2 CIRCUIT RANGE/PERFORMANCE - 2
P24B9 EVAP SYSTEM LEAK DETECTION PUMP PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE 60 seconds or more have elapsed since ignition switch is OFF. 2
  1. Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 L (5.3- 10.6 US gal, 4.4-8.8 Imp gal)].
  2. Using the Subaru Select Monitor, perform the clear memory of [Engine Control System]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
  3. With the ignition switch ON (engine stopped), read the values in [Engine Coolant Temperature 1] and [Intake Air Temp.], Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR .
  4. If the values from step 3) 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.
    • Hold the select lever in "P" range or "N" range at idling.
  5. Drive according to the drive pattern described below.
    G14412012Courtesy of SUBARU OF AMERICA, INC.
    NOTE:
    • In pattern (2), it is acceptable to decelerate to less than 80 km/h (50 MPH) or to stop the vehicle depending on the traffic conditions. Drive the vehicle at 80 km/h (50 MPH) or more until the total driving time reaches or exceeds 15 minutes.
    • There is no given transition time between idling and cruising.
    • Driving at constant speed only on a downhill causes smaller engine load and may result in failure to obtain a right diagnostic result.
    • If the ignition switch is turned to OFF during inspection mode F, perform this driving cycle again after satisfying the conditions listed in the table.
  6. Read the readiness code of [Engine Control System] using Subaru Select Monitor and check that the concerned self-diagnosis is completed. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>ALL READINESS DIAGNOSTIC CODE(S) .
  7. Read the pending code using the Subaru Select Monitor or general scan tool. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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