P1133Air-Fuel Ratio Sensor Circuit Response (Bank 1 Sensor 1)
On Toyota, the bank 1 front A/F sensor responds too slowly to mixture changes.
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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
Motor · Powertrain
La falla pertenece al grupo motopropulsor (motor y gestión electrónica).
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Symptoms You Will Notice
What you may observe when this code appears
- High fuel consumption
- Rough idle
- Check Engine light
Possible Causes
The components or conditions that trigger this code
- 1Aged A/F sensor
- 2Sensor contamination
- 3Exhaust leak before the sensor
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Inspect for exhaust leaks
- 2Replace the air-fuel ratio sensor
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)
Varies by diagnosis
* Diagnosis only: $50–$150
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