DTC code

P2270: Secondary HO2S Sensor 2 Circuit Signal Stuck Lean

Vehicle-specific published guides for this diagnostic trouble code.

Secondary HO2S Sensor 2 Circuit Signal Stuck Lean

P2270 may mean the ECM/PCM is seeing the downstream oxygen sensor signal stay lean when it should be able to respond normally.

Article vehicle: 2010-2015 Honda Civic 1.8 Gas

P2270 may indicate that the ECM/PCM is seeing the secondary HO2S, sensor 2, signal stuck lean.

Article vehicle: 2016-2024 Honda Civic 1.5TurboGas

P2270 may indicate the PCM is seeing the secondary heated oxygen sensor, Sensor 2, signal stuck lean.

Article vehicle: 2020-2025 Honda Cr V 2.0Hybrid

P2270 may indicate that the secondary heated oxygen sensor, Sensor 2, is reporting a lean-biased signal or is not responding as expected.

Article vehicle: 2018-2025 Honda Accord 2.0Hybrid

P2270 means the downstream heated oxygen sensor signal may be staying lean when the PCM expects a different response.

Article vehicle: 2016-2024 Honda Civic 2.0 Gas

P2270 may indicate the ECM/PCM is seeing the downstream secondary oxygen sensor signal stay too low when the sensor heater is being powered.

Article vehicle: 2017-2025 Honda Cr V 1.5TurboGas