P2515
A/C Refrigerant Pressure Sensor B Circuit
A/C / HVAC
Generic OBD-II
Low
What it means
P2515 means the ECM or HVAC module has detected a circuit problem with the 'B' A/C refrigerant pressure sensor. That sensor lets the system protect the compressor and control the cooling fans based on refrigerant pressure. The fault is electrical — the sensor, its wiring, or a connector — so the engine drives normally, but the air-conditioning may be disabled until it is repaired.
Low
Can I keep driving? Yes — the engine runs normally; you may just lose air-conditioning or see the cooling fans behave differently.
Common symptoms
What you'll notice
- Check-engine light on
- A/C not cooling or the compressor not engaging
- Cooling fans running high or not cycling normally
- Often no effect on how the engine drives
Common causes
Most likely first
- Faulty A/C refrigerant pressure sensor 'B'Likely
- Open, shorted, or chafed wiring in the sensor circuitCommon
- Corroded or loose connector at the sensorCommon
- Signal or reference voltage problem from the moduleLess often
How to diagnose & fix
Work through it in order
- Scan and read freeze-frame data to see the fault conditions.
- Inspect the pressure sensor 'B' connector and wiring for damage or corrosion.
- Check the sensor's 5-volt reference and signal voltage at the connector.
- Replace the A/C refrigerant pressure sensor if the wiring is good.
- Verify system refrigerant charge once the circuit fault is resolved.
FAQ
Quick answers
Is it safe to drive with P2515?+
Yes. This is an A/C-system circuit fault, not an engine or safety issue. The main effect is that the A/C may not work and the cooling fans may run differently.
Can I just clear P2515?+
You can, but if the sensor or wiring is faulty it will come back and the A/C may stay disabled. Fix the circuit first.
Related codes
Often seen with P2515
Read & clear P2515 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX