KlaroP0531
MODERATEA/C Refrigerant Pressure Sensor Circuit Range/Performance
What this code means
A/C Refrigerant Pressure Sensor Circuit Range/Performance. 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
- 31P0531
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.