Powertrain, generic (extended)

P2515 A/C Refrigerant Pressure Sensor B Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2515 is the general circuit fault of a second refrigerant pressure sensor, called B. Heat pump systems and vehicles with electric compressors often measure pressure at several points in the circuit; which position is B is up to the maker. Audi bulletin 87 22 35 (November 2022) ties P251500 to refrigerant pressure sensor 2 (G395/G827), read by thermal management module J1024 on 2020–2022 models from A6 to Q8 and e-tron: sensors produced prior to week 31 of 2021 had failing electronics, the cabin stopped cooling, sometimes with P053000 for sensor A as well, and a revised sensor is the cure. Ford's 2014 BOSS 302S engine table lists P2515 without a lamp mark. Low, high and plausibility faults of the same sensor are P2517, P2518 and P2516. Expect weak or absent cooling.

Likely causes

Pressure sensor electronics failed (Audi early build sensors)
Connector corroded or wiring to the sensor damaged
Evaluating module (thermal management or engine) faulty

Symptoms

  • A/C does not cool or cools only intermittently
  • Compressor stays off
  • Further A/C pressure codes such as P0530 stored

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–350
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ac pressure sensor bsensor wiring

Related codes

P2516P2517P2518P0530

References: static.nhtsa.gov, performanceparts.ford.com.