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Engine-Codes – Scion – P1133 Scion

P1133 Scion Code - Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1

Quick Answer

The P1133 Scion code indicates a malfunction in the air/fuel ratio sensor circuit for Bank 1 Sensor 1. Common causes include Faulty air/fuel ratio sensor, Wiring or connector issues, Exhaust leaks. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1133 Scion indicates Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1.
Common causes
Common causes include Faulty air/fuel ratio sensor, Wiring or connector issues, Exhaust leaks.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1133 Scion Description

The P1133 Scion code indicates a malfunction in the air/fuel ratio sensor circuit for Bank 1 Sensor 1. This sensor is responsible for measuring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air/fuel mixture for optimal combustion. When this sensor malfunctions or fails to respond correctly, it can lead to issues with fuel efficiency, emissions, and overall engine performance.

OBDII Code P1133 Scion - Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1
P1133 Scion Code - Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1

Common Causes of P1133 Scion

  1. Faulty air/fuel ratio sensor
  2. Wiring or connector issues
  3. Exhaust leaks
  4. Contamination of the sensor
  5. ECM malfunction

Symptoms of P1133 Scion

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Poor acceleration
  4. Increased emissions
  5. Check Engine Light illuminated

How to Fix P1133 Scion

  1. Diagnose the code using a scan tool to confirm the specific issue with the air/fuel ratio sensor.
  2. Inspect the wiring and connectors for any damage or corrosion and repair or replace as needed.
  3. Check for exhaust leaks and repair them to ensure accurate sensor readings.
  4. Replace the air/fuel ratio sensor if it is faulty or contaminated.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1133 Scion

The typical repair cost for addressing a P1133 Scion code can range from $200 to $500, including parts and labor. However, the actual cost may vary depending on the location, vehicle make and model, and the specific repairs needed. It is advisable to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the individual circumstances.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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