DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2515
P2515 indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit for the 'B' refrigerant pressure sensor, which is used to monitor air conditioning system pressure. The PCM compares the sensor signal voltage against expected values and sets this code when the signal is out of range, erratic, or missing entirely.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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