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P0152 - O2 Sensor Circuit High Voltage Bank 2 Sensor 1

Possible causes
- Faulty Front Heated Oxygen Sensor Bank 2
- Intake air leaks may be faulty
- Exhaust gas leaks
- Front Heated Oxygen Sensor Bank 2 harness is open or shorted
- Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
Tech notes
Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem
When is the code detected?
An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
P0152 Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

P0152 Information for specific makes
P0152 AUDI HO2S21 Sensor Circuit High Voltage
P0152 BMW O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 BUICK HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 CADILLAC HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 CHEVROLET HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 CHRYSLER O2 sensor 2/1 Circuit High
P0152 DODGE O2 sensor 2/1 Circuit High
P0152 FORD O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 GMC HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 HYUNDAI HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 INFINITI-2 Air Fuel Ratio Circuit High Bank 2 Sensor 1
P0152 INFINITI O2 Sensor Circuit High Bank 2 Sensor 1
P0152 JAGUAR O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 JEEP O2 sensor 2/1 Circuit High
P0152 KIA HO2S21 Circuit High Voltage
P0152 LEXUS HO2S21 Circuit High Voltage
P0152 MAZDA HO2S LF Circuit High Input
P0152 MERCEDES-BENZ O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 MERCURY O2 Sensor Circuit High Voltage Bank 2 Sensor 1
P0152 MITSUBISHI Cylinder 2-3 Heated Oxygen Front Sensor Circuit High Voltage
P0152 NISSAN-2 Air Fuel Ratio Circuit High Bank 2 Sensor 1
P0152 NISSAN O2 Sensor Circuit High Bank 2 Sensor 1
P0152 PONTIAC HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 SATURN HO2S Circuit High Voltage Bank 2 Sensor 1
P0152 SCION HO2S21 Circuit High Voltage
P0152 SUBARU HO2S21 Circuit High Voltage
P0152 TOYOTA HO2S21 Circuit High Voltage
P0152 VOLKSWAGEN HO2S21 Sensor Circuit High Voltage
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