SpareRadar OBD-II Code Lookup

P1540

Set by the manufacturer, so it means different things on different makes. 12 makes in the table below.

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What P1540 means, by make 12 makes
  • Audi Vehicle speed signal to large signal 461C 17948
  • BMW Pedal Position Sensor
  • Chevrolet Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) Disabled
  • Citroen Air Bypass Valve Circuit Malfunction
  • Ford Air Bypass Valve Circuit Malfunction
  • Mazda ABV System Fault
  • Mercedes-Benz Air Bypass Valve Circuit
  • Opel AC refrigerant pressure sensor - circuit malfunction
  • Peugeot Air Bypass Valve Circuit Malfunction
  • Subaru Radiator Fan Relay 1 Circuit High Input
  • Volkswagen Vehicle speed signal to large signal 461C 17948
  • Volvo Vehicle Speed Sensor High Input

Each line is that manufacturer's own meaning for P1540. They are genuinely different faults, not rewordings of one, so a meaning listed against one make says nothing about the others. If your make is not listed, we do not hold it - your manufacturer's service information is the authority.

Code structure P1540
P
Powertrain
engine, transmission and emissions
1
Manufacturer-specific
Defined by the vehicle manufacturer, so the meaning varies between makes.
5
4
0
Fault index
identifies the specific fault
Powertrain Manufacturer-specific
Nearby codes in the P1 range
P1535 manufacturer-specific, 10 makes P1536 manufacturer-specific, 13 makes P1537 manufacturer-specific, 9 makes P1539 manufacturer-specific, 10 makes P1542 manufacturer-specific, 8 makes P1543 manufacturer-specific, 5 makes P1544 manufacturer-specific, 6 makes P1547 manufacturer-specific, 4 makes

Manufacturer code meanings from kierandrewett/obd (b56a07a), used under the MIT licence. Copyright (c) Kieran Drewett. SpareRadar is not affiliated with the dataset's authors.