Supply voltage too high.
â–¶ How to fix
Clear the fault code if an auxiliary starting device has been used and check that the fault is not generated again. Otherwise check the alternator, battery, connectors and wiring.
What you'll see
No driver-visible symptom recorded.
System reaction
Solenoid valves are turned off if the voltage is higher than 39V. When this fault is active, it prevents the generation of fault codes for the solenoid valves.
Diagnostic depth
Detection
The supply voltage has been too high, higher than 35 V.
Possible cause
U30 has exceeded 35 V. An auxiliary starting device has probably been used and supplied the electrical system with too high a voltage for a short period of time. Components or wiring may be defective.