Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 |
|
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 |
- 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)].
- Using the Subaru Select Monitor, perform the clear memory of [Engine Control System]. Refer to COMMON (DIAG)>CLEAR MEMORY .
- With the ignition switch ON (engine stopped), read the values in [Engine Coolant Temperature 1] and [Intake Air Temperature]. Refer to COMMON (DIAG)>DATA MONITOR .
- 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.
- Read the temporary code using the Subaru Select Monitor or general scan tool. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
Use the Manual With the Right Hardware
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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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