F74 Fault — Water pressure sensor reading too high or short circuit

What does F74 mean?

The water pressure sensor is reporting a value that is too high, or its supply line has a short circuit to 5V/24V, or there's an internal fault in the sensor.

• Line to the water pressure sensor has a short circuit to 5 V/24 V
• Internal fault in the water pressure sensor

Click steps to track your progress.

1. 1

   Check the continuity down the wiring harness to the pressure sensor (requires specialist tools).

2. 2

   Check the voltages to the pressure sensor (requires specialist tools).

3. 3

   Check for any signs of moisture around the plug on the pressure sensor.