P0116 Fault Code

Engine Coolant Temperature Circuit Range/Performance Problem

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

The P0116 code indicates that there is a problem with the Engine Coolant Temperature (ECT) circuit's performance or range. This code typically means that the engine control module (ECM) is receiving incorrect signals from the ECT sensor, which is vital for monitoring engine temperature and regulating fuel mixture for optimal performance. If this issue is left unresolved, it can lead to the engine running inefficiently or overheating.

What are the symptoms of the P0116 code?

Symptoms that may accompany the P0116 code are:

• Overheating engine.
• Poor fuel economy.
• Engine performance issues such as stalling or rough idling.
• Check Engine Light (CEL) illuminated on the dashboard.

What causes the P0116 code?

The most common causes for a P0116 code include:

• Faulty engine coolant temperature sensor.
• Damaged wiring or connectors in the ECT circuit.
• Corrosion in the electrical connectors.
• A malfunctioning engine control module (ECM).

How to fix P0116?

To resolve the P0116 code, the following steps should be taken:

• Inspect the engine coolant temperature sensor and replace it if faulty.
• Check the wiring and connectors for any signs of damage or corrosion, repairing or replacing as necessary.
• Clear the fault code from the ECM and perform a road test to ensure the problem is resolved.
• If the code returns, further diagnosis of the ECM may be needed.