P2515
A/C Refrigerant Pressure Sensor B Circuit
General electrical fault in the second A/C refrigerant pressure sensor circuit. Sensor B usually monitors the low-side or compressor-suction pressure (in addition to high-side sensor A). The ECM cannot read a plausible value and disables variable compressor control to avoid evaporator freeze-up or overpressure.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open or shorted wiring to the sensorCommon
- Failed sensor elementPossible
Parts involved
- AC Pressure Sensor B
- Sensor Wiring
P2515 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.