P2079 Fault Code

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Intermittent Bank 1a

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

The P2079 fault code is triggered when the Engine Control Module (ECM) detects an intermittent issue with the Intake Manifold Tuning (IMT) Valve Position Sensor or Switch Circuit for Bank 1a. This sensor plays a crucial role in optimizing engine performance by adjusting the position of the intake manifold tuning valve, which helps manage airflow and improves fuel efficiency.

What are the symptoms of the P2079 code?

Drivers may experience the following symptoms when the P2079 code is present:

• Decreased engine performance, leading to sluggish acceleration
• Poor fuel economy
• Illuminated check engine light
• Rough idling or stalling
• Increased engine noise due to improper airflow management.

What causes the P2079 code?

Common causes for the P2079 code include:

• Faulty IMT valve position sensor
• Damaged wiring or connectors in the sensor circuit
• A malfunctioning engine control module (ECM)
• Vacuum leaks in the intake manifold
• Carbon buildup or blockages affecting the IMT valve function.

How to fix P2079?

To resolve the P2079 fault code, a thorough diagnostic process is recommended, which may include:

• Inspecting the IMT valve position sensor and its wiring for damage or corrosion.
• Testing the sensor for proper operation and replacing it if necessary.
• Checking for any vacuum leaks in the intake manifold and sealing them.
• Cleaning any carbon buildup affecting the IMT valve's movement.
• Reprogramming or replacing the ECM if it's determined to be faulty.