P2557 Fault Code

Engine Coolant Level Sensor/Switch Circuit Range/Performance

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

The P2557 fault code indicates an issue with the engine coolant level sensor or the switch circuit that monitors the coolant level. The sensor is crucial for ensuring that the engine operates within the appropriate temperature range, preventing overheating and potential engine damage. When the circuit shows range or performance issues, it can lead to incorrect readings, affecting engine performance and longevity.

What are the symptoms of the P2557 code?

Drivers may notice various symptoms, such as:

• Warning lights on the dashboard indicating low coolant levels.
• Overheating of the engine due to insufficient coolant detection.
• Unusual engine performance, such as reduced power or increased fuel consumption.
• A persistent smell of coolant or visible coolant leaks.

What causes the P2557 code?

Several factors can cause the P2557 code, including:

• A faulty engine coolant level sensor that is not accurately detecting coolant levels.
• Damaged wiring or connectors in the coolant level sensor circuit, leading to poor electrical connections.
• A short circuit or open circuit in the coolant level sensor wiring.
• Contaminated coolant that may affect sensor performance.

How to fix P2557?

To resolve the P2557 code, the following steps should be taken:

• Inspect and test the engine coolant level sensor for proper operation and replace if faulty.
• Check the wiring and connectors in the sensor circuit for signs of damage or corrosion and repair as needed.
• Ensure that the coolant is clean and at the proper level to avoid contamination issues.
• Clear the fault codes and run the vehicle to see if the problem returns, confirming successful repairs.