What does code P2537 mean?

Q: What does code P2537 mean?

Ignition Switch Accessory Position Circuit Low. P2537 indicates that the ignition switch accessory position circuit is reporting a low voltage condition, meaning the body control module or powertrain control module sees the accessory feed at or near ground when it should be at battery voltage. This typically occurs when the key is turned to the accessory position or when the circuit is expected to be live, and the module detects an abnormally low signal on the accessory sense wire.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2537

P2537Ignition Switch Accessory Position Circuit Low

P2537 indicates that the ignition switch accessory position circuit is reporting a low voltage condition, meaning the body control module or powertrain control module sees the accessory feed at or near ground when it should be at battery voltage. This typically occurs when the key is turned to the accessory position or when the circuit is expected to be live, and the module detects an abnormally low signal on the accessory sense wire.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.