Lexus DTC P1133 – Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1 Sensor 1)
DTC P1133 meaning on Lexus
DTC P1133 for Lexus indicates a malfunction in the Air/Fuel Ratio Sensor Circuit Response for Bank 1 Sensor 1. This code specifically relates to the sensor located before the catalytic converter on the bank of cylinders that contains cylinder 1.
Lexus DTC P1133 symptoms
Symptoms of DTC P1133 on a Lexus may include:
- Check Engine Light illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
Lexus DTC P1133 causes
Common causes of DTC P1133 on a Lexus include:
- Faulty Air/Fuel Ratio Sensor (Bank 1 Sensor 1)
- Wiring or connector issues in the sensor circuit
- Exhaust leaks near the sensor
- Engine running too rich or too lean
Lexus DTC P1133 seriousness
DTC P1133 should not be ignored as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P1133 on Lexus
To diagnose DTC P1133 on a Lexus, a mechanic may perform the following steps:
- Use a scan tool to retrieve the specific fault code
- Inspect the wiring and connectors related to Bank 1 Sensor 1
- Check for exhaust leaks near the sensor
- Test the Air/Fuel Ratio Sensor for proper operation
How to fix DTC P1133 on Lexus
To fix DTC P1133 on a Lexus, the following steps may be taken:
- Replace the faulty Air/Fuel Ratio Sensor (Bank 1 Sensor 1)
- Repair any damaged wiring or connectors in the sensor circuit
- Address any exhaust leaks near the sensor
- Ensure the engine is running at the correct air/fuel mixture
How to erase DTC P1133 on Lexus
To erase DTC P1133 on a Lexus, the fault code can be cleared using a scan tool that has the capability to reset codes. Once the underlying issue has been addressed and fixed, the code can be cleared to turn off the Check Engine Light.
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