P0660 Fault Code

Intake Manifold Tuning Valve Control Circuit (Bank 1)

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

The P0660 fault code indicates a problem with the intake manifold tuning valve control circuit for Bank 1. This code is part of the powertrain control module (PCM) diagnostic features that monitor the system for proper operation. If the PCM detects an issue within this circuit, it triggers the check engine light to alert the driver to the potential problem.

• The intake manifold tuning valve helps optimize engine performance by adjusting airflow according to engine speed and load.
• A malfunction can lead to decreased efficiency, increased emissions, and reduced engine responsiveness.

What are the symptoms of the P0660 code?

Drivers experiencing a P0660 code might notice the following symptoms:

• Reduced engine power and performance.
• Increased fuel consumption.
• A rough idle or stalling.
• Illuminated check engine light on the dashboard.
• Potentially increased emissions.

What causes the P0660 code?

Several factors may contribute to the P0660 code being triggered, including:

• A defective intake manifold tuning valve.
• Wiring issues such as frayed or shorted wires in the control circuit.
• Poor electrical connections or corroded terminals.
• Faulty PCM or software issues within the engine control module.

How to fix P0660?

To resolve the P0660 fault code, mechanics may:

• Inspect the wiring and connectors associated with the intake manifold tuning valve for any visible damage or corrosion.
• Test the intake manifold tuning valve to see if it is functioning properly.
• If necessary, replace the defective valve.
• Clear the codes from the PCM and perform a road test to ensure the issue is resolved.
• If problems persist, a deeper diagnostic of the PCM and related components may be required.