OBD-II code · Powertrain (generic, extended)
P2516 A/C Refrigerant Pressure Sensor B Circuit Range/Performance
A/C refrigerant pressure sensor B is electrically intact, but its reading does not match the system model — for example pressures that do not fall when the compressor is off, do not change with ambient temperature, or contradict pressure sensor A. Often a refrigerant charge issue or a contaminated sensor.
Is it safe to drive with P2516?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLow refrigerant charge
- PossibleContaminated or aged sensor diaphragm
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- AC Pressure Sensor B, Refrigerant Charge
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.