P0694 Fault Code

Fan 2 Control Circuit High

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

The P0694 fault code indicates an issue with the Fan 2 Control Circuit, which is responsible for regulating the operation of the second cooling fan in your vehicle's cooling system. This fault typically arises when the circuit voltage reading is higher than expected, leading the engine control module (ECM) to flag an error.

What are the symptoms of the P0694 code?

Common symptoms associated with the P0694 code may include:

• Overheating of the engine due to insufficient cooling.
• Erratic cooling fan operation or failure to turn on.
• Illumination of the check engine light.
• Audible noise from the cooling fan area if it is continuously running or stuck.

What causes the P0694 code?

Several factors can lead to this fault code, including:

• Short circuits in the wiring.
• Faulty cooling fan relay.
• Issues with the ECM.
• Damaged or corroded connectors.
• Malfunctioning temperature sensors that influence fan operation.

How to fix P0694?

To resolve the P0694 fault code, follow these steps:

• Inspect the wiring and connectors for any signs of damage or corrosion. Repair or replace any faulty components.
• Test the cooling fan relay to ensure it is functioning properly and replace it if necessary.
• Check the voltage readings at the fan control circuit to confirm they are within the specified range.
• If the wiring and components are intact, consider reprogramming or replacing the ECM if it is determined to be the root cause.