Lexus DTC P1401 – Sub-TP Sensor Range/Performance
DTC P1401 meaning on Lexus
DTC P1401 on a Lexus indicates an issue with the Sub-Throttle Position Sensor Range/Performance. This diagnostic trouble code is triggered when the engine control module detects that the signal from the sub-throttle position sensor is outside the expected range or not performing as intended.
Lexus DTC P1401 symptoms
Symptoms of DTC P1401 on a Lexus may include:
- Check Engine Light illuminated on the dashboard
- Engine may run rough or hesitate during acceleration
- Reduced engine performance
Lexus DTC P1401 causes
Common causes of DTC P1401 on a Lexus include:
- Faulty sub-throttle position sensor
- Wiring or connector issues in the sub-throttle position sensor circuit
- Carbon buildup in the throttle body affecting sensor operation
Lexus DTC P1401 seriousness
While DTC P1401 may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential engine performance problems and ensure proper vehicle operation.
How to diagnose DTC P1401 on Lexus
To diagnose DTC P1401 on a Lexus, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the trouble codes and freeze frame data
- Inspect the sub-throttle position sensor and its wiring for any visible damage or corrosion
- Test the sensor’s output voltage and resistance to determine if it is functioning correctly
How to fix DTC P1401 on Lexus
To fix DTC P1401 on a Lexus, the following steps may be taken:
- Replace the sub-throttle position sensor if it is found to be faulty
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Clean the throttle body to remove any carbon buildup that may be affecting sensor operation
How to erase DTC P1401 on Lexus
To erase DTC P1401 on a Lexus, the code can be cleared using a diagnostic scanner that has the capability to reset trouble codes. Once the issue has been addressed and fixed, the code can be cleared to turn off the Check Engine Light.
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