Toyota DTC P1400 – Sub-Throttle Position Sensor
DTC P1400 meaning on Toyota
DTC P1400 on Toyota refers to a fault with the Sub-Throttle Position Sensor Circuit. This diagnostic trouble code indicates that there is an issue with the sensor responsible for monitoring the position of the sub-throttle valve.
Toyota DTC P1400 symptoms
- Check Engine Light (MIL) illuminated
- Engine may run rough or hesitate
- Reduced engine performance
- Poor fuel economy
Toyota DTC P1400 causes
- Sub-Throttle Position Sensor failure
- Wiring or connector issues in the sensor circuit
- Electronic Control Module (ECM) fault
Toyota DTC P1400 seriousness
The seriousness of DTC P1400 on a Toyota depends on the underlying cause. Ignoring this fault can lead to poor engine performance, reduced fuel efficiency, and potential drivability issues. It is recommended to address this code promptly to prevent further damage.
How to diagnose DTC P1400 on Toyota
- Use a scan tool to retrieve the trouble codes
- Inspect the Sub-Throttle Position Sensor and its wiring for any visible damage
- Check the sensor’s voltage and resistance values according to manufacturer specifications
- Test the sensor’s operation by manually moving the sub-throttle valve
How to fix DTC P1400 on Toyota
- Replace the Sub-Throttle Position Sensor if faulty
- Repair any damaged wiring or connectors in the sensor circuit
- If the ECM is determined to be faulty, replace or reprogram it as necessary
How to erase DTC P1400 on Toyota
- Use a scan tool to clear the trouble codes
- After making the necessary repairs, drive the vehicle to see if the code returns
- If the issue has been resolved, the Check Engine Light should turn off on its own