Code Definition

P0152 — O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0152

P0152 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0152 is stored, the module has detected a signal or supply voltage higher than the expected operating range; a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0152 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0152 fault code is activated when the Engine Control Module (ECM) identifies an abnormally high voltage output from the oxygen sensor in Bank 2, Sensor 1. This sensor is generally located upstream in the exhaust system, before the catalytic converter, on the side of the engine designated as Bank 2. A high voltage signal from this sensor is typically indicative of a rich air-fuel mixture, where there is too much fuel relative to the amount of oxygen in the exhaust. Causes for this high voltage output can include a malfunctioning oxygen sensor, wiring or connector issues, or problems with t...

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