P2518
A/C Refrigerant Pressure Sensor B Circuit High
P2518 is an OBD-II diagnostic trouble code meaning: A/C Refrigerant Pressure Sensor B Circuit High. Common causes: faulty refrigerant pressure sensor, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Air conditioner doesn't work
- Reduced cooling efficiency
- The air conditioning indicator is flashing
- The air conditioner turns on and off spontaneously
- Increased noise from the compressor
Causes
- Faulty refrigerant pressure sensor
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Problems with the air conditioning ECU
- Excessive pressure in the system (refrigerant recharge)
How to Fix
- Check the refrigerant level in the system
- Inspect the connectors and wiring of the sensor
- Check the resistance and voltage at the sensor
- Replace pressure sensor if necessary
- Check the operation of the air conditioning compressor
Related codes
Error P2518 by Vehicle Brand
FAQ
What does the P2518 code mean?
P2518 is an OBD-II diagnostic trouble code that indicates: A/C Refrigerant Pressure Sensor B Circuit High
What causes a P2518 error code?
The most common causes of P2518 include: Faulty refrigerant pressure sensor; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Problems with the air conditioning ECU.
How do I fix a P2518 diagnostic trouble code?
To fix P2518: Check the refrigerant level in the system. Inspect the connectors and wiring of the sensor. Check the resistance and voltage at the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2518?
Yes, but get it checked soon
How much does it cost to fix P2518?
The estimated repair cost for P2518 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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