P0058 — HO2S Heater Control Circuit High (Bank 2 Sensor 2)
Low severityWhat it means
P0058 is stored when the engine control unit sees a fault involving the oxygen sensor heater circuit (bank 2 sensor 2). The heater brings the oxygen sensor up to operating temperature quickly so the control unit can use it for fuel control soon after a cold start. A “high” reading means the signal is pinned near the top of its range — often an open circuit, a lost ground, or a short to voltage.
Common symptoms
- The live reading sits abnormally high or maxed out
- Usually only a check engine light
- Slightly worse fuel economy until the sensor warms up
- A possible failed emissions test
Likely causes
- Open signal or ground wire
- Signal wire shorted to a voltage supply
- Open or burned-out sensor heater element
- Blown fuse or wiring/connector fault to the heater
What to check first
- Check for an open circuit or missing ground at the sensor connector
- Check the heater fuse and the sensor's power and ground
- Measure the heater element resistance against specification
Can you keep driving?
Safe to drive short-term; it mainly affects cold-start fuelling and emissions, so repair to pass inspection.
Frequently asked questions
What is the most common cause of P0058?
The most likely cause is: Open signal or ground wire. Several other faults can set P0058 as well, so confirm the real cause with live data and the checks above before replacing any parts.
Can I just clear P0058 and keep driving?
Clearing P0058 with an OBD2 scanner turns the warning light off, but if the underlying fault has not been repaired the code will usually come back within a few drive cycles. Fix the cause first, then clear the code to confirm the repair worked.
How serious is P0058?
P0058 is a low-severity code. It rarely affects how the car drives, but it is still worth fixing so the engine runs efficiently and passes an emissions test.
Scan, log and diagnose with MechanicAI
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