P0665 Fault Code

Intake Manifold Tuning Valve Control Circuit High (Bank 2)

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

The P0665 code refers to a problem with the 'Intake Manifold Tuning Valve Control Circuit' for Bank 2. This circuit is responsible for regulating airflow in the engine's intake manifold which optimizes performance and efficiency. When this code is triggered, it indicates that the voltage in this circuit is higher than expected, which could hinder proper engine performance and efficiency.

What are the symptoms of the P0665 code?

Common symptoms associated with a P0665 code include:

• Reduced engine performance or power.
• Decreased fuel efficiency.
• Rough idling or stalling conditions.
• Illuminate the check engine light on the dashboard.
• Unusual engine sounds during operation.

What causes the P0665 code?

Several factors can contribute to a P0665 code, including:

• Faulty intake manifold tuning valve.
• Damaged or frayed wiring in the control circuit.
• Poor connection or corroded terminals.
• Issues with the engine control module (ECM).
• Vacuum leaks affecting manifold pressure.

How to fix P0665?

To resolve a P0665 code, the following steps are typically recommended:

• Inspect the wiring and connectors related to the intake manifold tuning valve for damage or corrosion.
• Test the intake manifold tuning valve for proper operation to ensure it opens and closes correctly.
• Clear the code after repairs and perform a test drive to see if the fault returns.
• If the issue persists, further diagnostics may be needed to evaluate the ECM or other related components.