A/C Refrigerant Pressure Sensor Circuit Malfunction
The P2515 code indicates a problem in the electrical circuit of the A/C refrigerant pressure sensor. This sensor monitors the pressure of the refrigerant in the A/C system and sends a signal to the PCM. When the PCM detects an abnormal voltage or signal from the sensor, it sets this code. Common issues include a faulty sensor, wiring problems, or a refrigerant pressure issue.
01. Most Common Causes
- Faulty A/C refrigerant pressure sensor
- Open or shorted wiring in sensor circuit
- Poor electrical connection at sensor
- Failed PCM (rare)
02. Symptoms You Will Notice
- A/C system inoperative or blows warm air
- Check Engine Light illuminated
- A/C compressor not engaging
- Erratic A/C operation
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P2515 is present.
Step 2: Visually inspect the A/C pressure sensor connector and wiring for damage or corrosion.
Step 3: Using a multimeter, check the sensor's reference voltage (typically 5V) and ground.
Step 4: Compare sensor signal voltage to actual refrigerant pressure using a gauge; replace sensor if readings don't match.
Step 5: If sensor and wiring are okay, test the PCM for proper signal reception.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, but the A/C may not work properly. Driving without A/C is safe, but if the sensor fails, it could affect engine performance in some vehicles.
How much does it cost to fix?▼
Typically $50-$150 for a new sensor plus labor. Diagnostic fees may apply.