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 B
| DTC | Description and trouble part | Condition | Number of driving cycles on the detecting condition |
|---|---|---|---|
| P0134 | A/F/O2 SENSOR CIRCUIT NO ACTIVITY DETECTED BANK 1 SENSOR 1 | - | 1 |
| P0137 | O2 SENSOR CIRCUIT LOW VOLTAGE BANK 1 SENSOR 2 | - | 2 |
| P0138 | O2 SENSOR CIRCUIT HIGH VOLTAGE BANK 1 SENSOR 2 | - | 2 |
| P0140 | O2 SENSOR CIRCUIT NO ACTIVITY DETECTED BANK 1 SENSOR 2 | - | 2 |
| P0500 | VEHICLE SPEED SENSOR "A" CIRCUIT | - | 1 |
| P059A | ACTIVE GRILLE AIR SHUTTER "A" POSITION SENSOR CIRCUIT | - | 1 |
| P059F | ACTIVE GRILLE AIR SHUTTER "A" PERFORMANCE/STUCK OFF | - | 2 |
| P05A0 | ACTIVE GRILLE AIR SHUTTER "A" STUCK ON | - | 2 |
| P05A1 | ACTIVE GRILLE AIR SHUTTER "A" POSITION SENSOR MINIMUM/MAXIMUM STOP PERFORMANCE | - | 2 |
| P05A2 | ACTIVE GRILLE AIR SHUTTER "A" CONTROL CIRCUIT/OPEN | - | 1 |
| P05A6 | ACTIVE GRILLE AIR SHUTTER "A" SUPPLY VOLTAGE CIRCUIT/OPEN | - | 1 |
| P05C0 | ACTIVE GRILLE AIR SHUTTER MODULE "A" OVER TEMPERATURE | - | 1 |
| P062D | FUEL INJECTOR DRIVER CIRCUIT PERFORMANCE BANK 1 | - | 1 |
| P1261 | CYLINDER 1 DIRECT FUEL INJECTOR CIRCUIT/OPEN | - | 1 |
| P1262 | CYLINDER 2 DIRECT FUEL INJECTOR CIRCUIT/OPEN | - | 1 |
| P1263 | CYLINDER 3 DIRECT FUEL INJECTOR CIRCUIT/OPEN | - | 1 |
| P1264 | CYLINDER 4 DIRECT FUEL INJECTOR CIRCUIT/OPEN | - | 1 |
WARNING:
When performing inspection mode B on a public road, pay sufficient attention to the traffic condition and give the highest priority to safe driving.
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.