P2518 Fault Code

A/C Refrigerant Pressure Sensor B Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The A/C Refrigerant Pressure Sensor B Circuit High fault code indicates that there is an issue with the refrigerant pressure sensor in the air conditioning system. This sensor is responsible for monitoring the pressure of the refrigerant, and when it detects a value that is too high, it triggers the fault code. This can lead to improper functioning of the A/C system, which affects the comfort of the vehicle's interior and can cause further issues if not addressed promptly.

What are the symptoms of the P2518 code?

Symptoms associated with the P2518 fault code may include:

• Air conditioning not functioning properly or not cooling.
• High refrigerant pressure warnings.
• A/C system shuts down intermittently.
• Unusual noises from the A/C system.
• Dashboard warning lights for the A/C system may be illuminated.

What causes the P2518 code?

Common causes of this fault code include:

• A defective A/C refrigerant pressure sensor.
• Electrical issues such as short circuits or broken wires in the wiring harness.
• Low refrigerant levels which can cause incorrect sensor readings.
• High refrigerant levels due to overcharging the A/C system.
• Malfunctioning HVAC control module.

How to fix P2518?

To resolve the P2518 fault code, consider the following steps:

• Inspect the refrigerant pressure sensor for any visible damage or corrosion.
• Test the sensor with a multimeter to ensure it is operating within the manufacturer's specifications.
• Check the wiring harness for any signs of damage or poor connections.
• Verify refrigerant levels and ensure that the A/C system is not overcharged.
• If necessary, replace the faulty sensor and clear the fault code using a diagnostic scanner to see if the issue is resolved.