DTC code

P0138: HO2S Circuit High Voltage Bank 1 Sensor 2

Vehicle-specific published guides for this diagnostic trouble code.

HO2S Circuit High Voltage Bank 1 Sensor 2

P0138 often means the engine control module may be seeing the heated oxygen sensor signal voltage higher than expected for that sensor circuit.

Article vehicle: 2014-2018 Gmc Sierra 1500 5.3 gas

P0138 may mean the engine control module is seeing a heated oxygen sensor signal that is higher than expected for the monitored conditions.

Article vehicle: 2019-2025 Chevrolet Silverado 1500 5.3 gas