CLAAS A091h: Supply of the 4 valve above max – Check the voltage delivered by the alternator value. and battery

The fault code indicates that the supply voltage to the 4 valve is above the maximum acceptable level. This may be caused by an overvoltage condition from the alternator or battery. The error can be cleared, but if it reappears, the 4 valve may need to be replaced.

1. 1

   The voltage delivered by the alternator

2. 2

   The voltage of the battery

3. 3

   The 4 valve

1. 1

   Check

   Measure the voltage delivered by the alternator and the battery to ensure they are within the acceptable range.

2. 2

   Clear

   Clear the fault code using the diagnostic tool.

3. 3

   Monitor

   Observe if the fault code reappears after clearing it.

4. 4

   Replace

   If the fault code reappears, replace the 4 valve.