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.
2020 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE
Inspection Mode F
| DTC | Item | Condition |
|---|---|---|
| P0708 | TRANSMISSION RANGE SENSOR "A" CIRCUIT HIGH | - |
| P1603 | ENGINE STALL HISTORY | - |
Diagnostic procedure:
- Check the readiness code using Subaru Select Monitor and confirm that the diagnosis is not completed.
- Start the engine.
- Depress the brake pedal and move the select lever to each range at an interval of five seconds.NOTE: Move the select lever in the following order: "P" → "R" → "N" → "D".
- Drive for three seconds at 16 km/h (10 MPH).NOTE: Drive in "D" range and "R" range.
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.