Toyota DTC P1155 – Air/Fuel Sensor Heater Circuit (Bank 1 Sensor 2)
DTC P1155 meaning on Toyota
DTC P1155 indicates a malfunction in the Air/Fuel Sensor Heater Circuit for Bank 1 Sensor 2 in a Toyota vehicle. This code specifically relates to the heating element within the sensor that helps it reach operating temperature quickly for optimal performance.
Toyota DTC P1155 symptoms
Symptoms of DTC P1155 in a Toyota may include:
- Check Engine Light illuminated
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
Toyota DTC P1155 causes
Common causes of DTC P1155 in a Toyota include:
- Faulty Air/Fuel Sensor Heater Circuit
- Wiring or connector issues in the sensor circuit
- Blown fuse related to the sensor heater
Toyota DTC P1155 seriousness
While DTC P1155 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and potential long-term engine damage if left unresolved. It is recommended to address this code promptly to maintain optimal vehicle performance.
How to diagnose DTC P1155 on Toyota
To diagnose DTC P1155 on a Toyota, follow these steps:
- Use an OBD-II scanner to retrieve the fault code
- Inspect the wiring and connectors related to Bank 1 Sensor 2
- Check the sensor heater circuit for continuity and proper voltage
- Test the sensor heater resistance to determine if it is within specifications
How to fix DTC P1155 on Toyota
To fix DTC P1155 on a Toyota, consider the following:
- Replace the Air/Fuel Sensor for Bank 1 Sensor 2 if the heater circuit is faulty
- Repair any damaged wiring or connectors in the sensor circuit
- Check and replace any blown fuses related to the sensor heater
How to erase DTC P1155 on Toyota
To erase DTC P1155 on a Toyota:
- Use an OBD-II scanner to clear the fault code
- If the underlying issue has been resolved, the Check Engine Light should turn off
- Ensure proper repairs have been made to prevent the code from reoccurring
Recommended tools for Toyota diagnostics
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