Description:

This diagnostic trouble code is generated when the PTA control software detects that the transmission input speed has suddenly dropped to 0 rpm, which is not a plausible scenario under normal operating conditions.

Reaction:

Limited or no function of the transmission until the error is corrected, indicating a critical issue with the transmission input speed sensor or related circuitry.

Recommendations:

Inspect Input Speed Sensor:

• Verify that the transmission input speed sensor is securely mounted and properly connected.
• Replace the sensor if it is found to be defective.

Check Sensor Wiring:

• Inspect the wiring harness for any signs of damage, wear, or disconnection.
• Repair or replace any damaged wiring.

Verify Signal Integrity:

• Use diagnostic tools to check the signal integrity from the input speed sensor.
• Ensure the sensor is sending accurate and consistent data to the control unit.

Review Related DTCs:

• Check for any additional diagnostic trouble codes that might be related and address them accordingly.

Note:

Sudden drops in transmission input speed readings can cause significant operational issues. Regular maintenance and prompt attention to sensor signals are crucial for reliable transmission performance.