A/C Refrigerant Pressure Sensor Circuit Low
The P2517 code indicates that the A/C refrigerant pressure sensor is reporting a voltage lower than the expected range. This sensor monitors the pressure of the refrigerant in the A/C system and sends a signal to the PCM. A low circuit condition can be caused by a faulty sensor, wiring issues, low refrigerant charge, or a problem with the A/C system. This can lead to improper A/C operation or system shutdown.
01. Most Common Causes
- Faulty A/C refrigerant pressure sensor
- Open or shorted wiring in sensor circuit
- Low refrigerant charge
- Faulty PCM (rare)
02. Symptoms You Will Notice
- A/C system inoperative or blows warm air
- A/C compressor clutch not engaging
- Check Engine Light illuminated
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to read the sensor voltage and compare to manufacturer specs.
Step 2: Visually inspect the sensor and wiring for damage or corrosion.
Step 3: Check refrigerant pressure with a manifold gauge set to verify proper charge.
Step 4: Test sensor signal circuit for continuity and shorts to ground or power.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is generally safe to drive, but the A/C may not work properly. However, if the A/C system is low on refrigerant, continued operation could damage the compressor.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, but additional costs may apply if refrigerant recharge or wiring repair is needed.