P0167O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 3)
The ECU detects an electrical fault in the heater circuit of the third O2 sensor on bank 2. Heater current out of range — open or shorted heater, blown fuse, wiring fault.
Can I keep driving? With caution
You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.
Sistema Afectado
Aire / Combustible · Inyección, MAF, MAP, O₂
Relacionado con la mezcla aire-combustible: sensores de flujo, presión, inyectores o bomba.
Espacio para vendedores de repuestos
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Symptoms You Will Notice
What you may observe when this code appears
- Check engine light on after several drive cycles Slightly increased fuel consumption during cold start Delayed entry into closed-loop fuel control Failed emissions inspection (lambda readiness)
Possible Causes
The components or conditions that trigger this code
- 1Heater element open Heater fuse blown
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: easy. Estimated time: 0.3-1.5 hours. Estimated cost: €80-€
- 2DIY possible
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Sensors + injectors
* Diagnosis only: $50–$150
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