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.
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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 34 (ENGINE CONTROL SYSTEM (2.5L) (DIAGNOSTICS) (4 OF 4))DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC P2270: O2 SENSOR SIGNAL BIASED/STUCK LEAN BANK 1 SENSOR 2GENERAL DESCRIPTIONEXECUTION CONDITION
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans
Execution Condition
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Execution Condition
WARNING: This page is about a different car, the 2022 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
| Secondary parameters | Execution condition |
|---|---|
| Battery voltage | 10.9 V or more |
| Sub feedback | In operation |
| Amount of intake air | 10g/s (0.35 oz/s) or more |
| Rear oxygen element impedance | 185Ξ© or less |
| Enable conditions at interrupt control are as follows | |
| Continuous time when rear oxygen sensor output voltage is less than 0.55 V | 5000 ms or more |
| Air fuel ratio reduced from target air fuel ratio | Value from Map |
MapΒ
VOLTAGE SPECIFICATIONS - MAP
| Output voltage of rear oxygen sensor (V) | 0.000 | 0.150 | 0.200 | 0.400 | 0.600 |
|---|---|---|---|---|---|
| Air fuel ratio reduced from target air fuel ratio (%) | 8 | 8 | 4 | 4 | 4 |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.