P0119 Fault Code

Engine Coolant Temperature Circuit Intermittent

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

The P0119 fault code indicates an intermittent issue in the Engine Coolant Temperature (ECT) circuit. This means that the engine control unit (ECU) is having trouble reading the temperature of the coolant due to a malfunction in the circuit. Proper functioning of the ECT sensor is crucial for the engine's performance and efficiency.

What are the symptoms of the P0119 code?

Symptoms associated with the P0119 code may include:

• Overheating engine due to improper coolant readings.
• Poor fuel economy as the engine may run too rich or too lean.
• Illumination of the check engine light on the dashboard.
• Possible erratic engine performance, including stalling or starting difficulties.

What causes the P0119 code?

Several factors can lead to a P0119 error, including:

• Faulty ECT sensor that doesn't provide accurate readings.
• Wiring issues such as damaged connectors or frayed wires that interrupt the circuit.
• Poor electrical connections at the sensor or ECU.
• Issues with the ECU itself,
• Corrosion or dirt affecting sensor operation.

How to fix P0119?

To fix the P0119 fault code, consider the following steps:

• Start by inspecting the ECT sensor for any visible damage or corrosion.
• Check the wiring and connectors for continuity and signs of wear.
• Use a multimeter to test the ECT sensor's resistance and compare with manufacturer specifications.
• If the sensor is faulty, replace it with a new one.
• Repair any damaged wires or loose connections in the circuit.
• Lastly, clear the error code from the ECU and perform a road test to ensure the issue has been resolved.