PTA 000191.03 – Sensor for Transmission Output Speed, Voltage at Channel 1 Too High
PTA 000191.03 (PTA 191.03)
Code: 000191.03
Shortcode: 191.03
Description:
This diagnostic trouble code is generated when the PTA control software detects that the voltage at the channel 1 signal input of the transmission output speed sensor is too high. This condition indicates that the sensor circuit is open or shorted to a positive lead. If diagnostic trouble code PTA 524110.03 is also stored, it suggests a problem with the sensor supply voltage.
Reaction:
Limited or no function of the transmission until the error is corrected, indicating a significant issue with the sensor voltage.
Recommendations:
Inspect Sensor Circuit:
- Check the sensor circuit for any open connections or short circuits to positive leads.
- Repair any identified issues in the circuit.
Test Output Speed Sensor:
- Verify the sensor’s voltage output using a multimeter.
- Replace the sensor if it is producing abnormally high voltage readings.
Examine Wiring and Connectors:
- Inspect all wiring and connectors associated with the output speed sensor for signs of damage or corrosion.
- Repair or replace as necessary to ensure proper electrical connections.
Verify Sensor Supply Voltage:
- If diagnostic trouble code PTA 524110.03 is also stored, investigate the sensor supply voltage.
- Ensure the voltage supply is stable and within the specified range.
Note:
High voltage readings from the transmission output speed sensor can lead to severe operational problems. Regular inspection and maintenance of the sensor and its circuitry are essential to prevent these issues. Addressing any related voltage supply issues is also crucial for reliable sensor performance.


