P0139O2 Sensor Slow Response (Bank 2, Sensor 2)
⚙️ Powertrain (Motor y Transmisión)
Slow response of the downstream sensor.
Compatible with:🚗 Gas/Diesel🔋 Hybrid
⚠️
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.
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Symptoms You Will Notice
What you may observe when this code appears
- Similar to P0133
Possible Causes
The components or conditions that trigger this code
- 1Engine running rich (leaking injector, high fuel pressure)
- 2Sensor signal wire shorted to voltage
- 3Downstream O2 sensor failed
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Estimated Cost
Approximate range in USD (varies by region and shop)
$80—$600
Sensors + injectors
* Diagnosis only: $50–$150
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Quick Info
CodeP0139
CategoryMotor (P)
ManufacturerGeneric (SAE)
SeverityModerada
Symptoms1
Causes3
Solution steps0
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