Warning Z1 Air inlet sensor TL2 short circuit — Air sensor shorted

What does 5409 mean?

This warning indicates that the circuit for the air inlet sensor TL2 is shorted (less than 900 Ohm).

• The circuit for air inlet sensor TL2 or its signal cable is shorted.
• Defective I/O module.

Click steps to track your progress.

1. 1

   Measure the sensor's resistance and compare it to the values in the sensor table in the documentation.

2. 2

   If the resistance is too low, check the signal cable for damage or a short.

3. 3

   If the sensor itself is faulty, replace TL2. If the issue persists, consider replacing the I/O module.