P0563
MODERATESystem Voltage High
What this code means
System Voltage High. Unstable idle, cruise control, auxiliary inputs to the control unit. These codes show up as erratic behaviour at a standstill, or a function that refuses to engage.
How to read this code
- PPowertrain
- 0standardised code
- 5Idle speed and vehicle speed control
- 63P0563
The letter P names the system: Powertrain. The digit 0 that follows marks a standardised code, shared by all manufacturers code. The next digit, 5, locates the fault: idle speed and vehicle speed control.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back.
Nearby codes
- P0560System Voltage Malfunction
- P0561System Voltage Unstable
- P0562System Voltage Low
- P0565Cruise Control On Signal Malfunction
- P0566Cruise Control Off Signal Malfunction
- P0567Cruise Control Resume Signal Malfunction
- P0568Cruise Control Set Signal Malfunction
- P0569Cruise Control Coast Signal Malfunction