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.
2021 Subaru Crosstrek HybridFACTORY OEM SERVICE PROCEDURE
Inspection Mode Ar
| DTC | Description and trouble part | Condition | Number of driving cycles on the detecting condition |
|---|---|---|---|
| P04EC | EVAP SYSTEM LARGE LEAK DETECTED - FUEL TANK SIDE |
|
2 |
| P04ED | EVAP SYSTEM LARGE LEAK DETECTED - FRESH AIR SIDE | 2 | |
| P04EE | EVAP SYSTEM VERY SMALL LEAK DETECTED - FUEL TANK SIDE | 2 | |
| P04EF | EVAP SYSTEM VERY SMALL LEAK DETECTED - FRESH AIR SIDE | 2 | |
| P2402 | EVAP SYSTEM LEAK DETECTION PUMP CONTROL CIRCUIT HIGH | 1 | |
| P2404 | EVAP SYSTEM LEAK DETECTION PUMP SENSE CIRCUIT RANGE/PERFORMANCE | 2 | |
| P2420 | EVAP SYSTEM SWITCHING VALVE CONTROL CIRCUIT HIGH | 1 | |
| P2450 | EVAP SYSTEM SWITCHING VALVE PERFORMANCE/STUCK OPEN | 2 | |
| P2451 | EVAP SYSTEM SWITCHING VALVE STUCK CLOSED | 2 |
WARNING:
When performing inspection mode AR on a public road, pay sufficient attention to the traffic condition and give the highest priority to safe driving.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.