What does code P0158 mean?
High voltage signal detected from the rear oxygen sensor indicating rich mixture or short circuit
OBD-II Code
P0158 — Oxygen Sensor Circuit High Voltage Bank 2 Sensor 2
High voltage signal detected from the rear oxygen sensor indicating rich mixture or short circuit
Common symptoms
- High fuel consumption
- strong exhaust odor
Possible causes
- Signal shorted to voltage
- damaged sensor
- excessive fuel delivery
Initial recommendation
Inspect wiring and verify fuel pressure.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0158 with your vehicle's actual symptoms for more complete diagnostic guidance.
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