P0696 Fault Code

Fan 3 Control Circuit High

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

The P0696 fault code indicates an issue with the Fan 3 Control Circuit, specifically signaling a high voltage condition. This code is often related to faults within the wiring, connectors, or the fan control module itself.

• This code is activated when the engine control module (ECM) detects a higher than expected voltage in the fan control circuit for Fan 3.
• It typically relates to vehicles equipped with multiple cooling fans to maintain optimal engine temperature during operation.

What are the symptoms of the P0696 code?

When a P0696 code is present, you may notice:

• The engine running hotter than normal due to fan malfunction.
• The cooling fans may not operate correctly or at all, especially under heavy loads.
• Dashboard warning lights, particularly the check engine light, may illuminate.
• Potential decrease in fuel efficiency due to engine overheating.
• Other related codes may appear in conjunction with P0696.

What causes the P0696 code?

There are several potential causes for a P0696 fault code, including:

• Short circuit in the wiring harness that connects to the Fan 3 control circuit.
• Faulty Fan 3 relay or component.
• Bad connections or corroded terminals in the fan circuit.
• Malfunction within the Engine Control Module (ECM) or the fan control module.
• Overheating or excessive resistance in the fan motor itself.

How to fix P0696?

To resolve a P0696 fault code, follow these steps:

• Start by visually inspecting the wiring and connectors to the Fan 3 circuit for signs of damage or corrosion.
• Use a multimeter to check for proper voltage levels in the circuit and locate any short circuits.
• Test the Fan 3 relay to ensure it is functioning correctly or replace it if defective.
• If necessary, replace the fan motor if it shows signs of excessive resistance or failure.
• Clear the fault codes after repairs and perform a test drive to ensure the issue is resolved.