Code Definition

P0058 — HO2S Heater Control Circuit High (Bank 2 Sensor 2)

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

About P0058

P0058 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 P0058 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 P0058 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 P0058 code indicates a high voltage condition in the heater control circuit of the downstream oxygen sensor (Bank 2 Sensor 2), located after the catalytic converter. The heater element within the oxygen sensor is critical for quickly achieving its operational temperature after the engine starts. The Engine Control Module (ECM) sets this code when it detects a voltage in the heater circuit that is higher than expected, potentially affecting the sensor's effectiveness in accurately monitoring the exhaust gas composition for proper engine management.

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