P0058 low

HO2S Heater Control Circuit High (Bank 2 Sensor 2)

The P0058 code means the vehicle's onboard diagnostic system has detected: HO2S Heater Control Circuit High (Bank 2 Sensor 2). This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $80 - $300 (O2 sensor $60-$200; wiring repair $50-$150)

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Common Symptoms

Check Engine Light on
O2 heater fuse may blow repeatedly
Slight reduction in fuel economy
No significant drivability issues
Emissions test failure

Probable Causes (Ranked by Likelihood)

Shorted heater element inside the downstream O2 sensor Very High
Short to power in the heater circuit wiring High
Water intrusion in the sensor connector Moderate
Damaged wiring insulation from road debris Moderate
PCM heater driver stuck on Low

Step-by-Step Diagnostic Procedure

Check the O2 heater fuse. Replace if blown and monitor for immediate re-failure.
Disconnect the bank 2 sensor 2 O2 sensor and measure heater resistance (2-15 ohms typical). Below 1 ohm indicates a shorted element.
With the sensor disconnected, clear codes and drive. If the code does not return, the sensor is at fault.
Inspect wiring under the vehicle for chafed insulation, road damage, or shorts to the body.
Check the sensor connector for moisture, corrosion, or melted pins.

Frequently Asked Questions

Can I drive with code P0058?

Yes, you can drive normally. The downstream sensor on bank 2 only monitors catalyst efficiency. However, if the short keeps blowing fuses, address it sooner to prevent other electrical issues.

What causes high circuit on a downstream O2 sensor?

A high circuit reading means excessive current is flowing through the heater. This is usually a shorted heater element inside the sensor or damaged wiring that creates an unintended electrical path.

Can road salt and moisture cause P0058?

Yes. The downstream O2 sensor is located under the vehicle and exposed to road salt, water spray, and debris. These can corrode the connector or damage wiring insulation, leading to shorts in the heater circuit.