P0664 Fault Code

Intake Manifold Tuning Valve Control Circuit Low (Bank 2)

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

The P0664 code indicates a problem with the intake manifold tuning valve control circuit for bank 2. This valve is critical for optimizing engine performance by adjusting the airflow in the intake manifold based on engine speed and load. When the circuit is low, it may affect the engine's ability to operate efficiently and can lead to reduced power and increased emissions.

What are the symptoms of the P0664 code?

Symptoms you might observe include:

• Reduced engine power or performance.
• Decreased fuel efficiency.
• Check Engine Light (CEL) illuminated.
• Rough idling or engine stalling in severe cases.

What causes the P0664 code?

Possible causes for this code include:

• Faulty intake manifold tuning valve.
• Damaged wiring or connectors in the valve control circuit.
• Issues with the Engine Control Module (ECM).
• Short or open circuits affecting the tuning valve's operation.

How to fix P0664?

To resolve the P0664 fault code, consider the following steps:

• Inspect the intake manifold tuning valve and wiring for damage or corrosion.
• Test the tuning valve to ensure it operates correctly.
• Repair or replace any damaged wiring or connectors.
• If necessary, reprogram or replace the ECM if it is determined to be faulty.