P2079 Code - Intake Manifold Tuning Valve Position Sensor/Switch Circuit Intermittent
Quick Answer
The diagnostic trouble code P2079 indicates a problem with the intake manifold tuning valve position sensor/switch circuit in the vehicle. Common causes include Faulty Intake Manifold Tuning Valve Position Sensor/Switch: The sensor or switch itself may be faulty, causing intermittent readings or no readings at all, Wiring Issues: Damaged or corroded wiring connections between the sensor/switch and the ECM can disrupt communication, Poor Electrical Connections: Loose or poor electrical connections can lead to intermittent signal transmission. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2079 indicates Intake Manifold Tuning Valve Position Sensor/Switch Circuit Intermittent.
- Common causes
- Common causes include Faulty Intake Manifold Tuning Valve Position Sensor/Switch: The sensor or switch itself may be faulty, causing intermittent readings or no readings at all, Wiring Issues: Damaged or corroded wiring connections between the sensor/switch and the ECM can disrupt communication, Poor Electrical Connections: Loose or poor electrical connections can lead to intermittent signal transmission.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P2079 Description
The diagnostic trouble code P2079 indicates a problem with the intake manifold tuning valve position sensor/switch circuit in the vehicle. This sensor or switch is responsible for monitoring the position of the intake manifold tuning valve, which controls the airflow through the intake manifold. The intake manifold tuning valve helps to optimize the engine's performance by adjusting the length of the intake runners, improving airflow at different engine speeds.
Common Causes of P2079
- Faulty Intake Manifold Tuning Valve Position Sensor/Switch: The sensor or switch itself may be faulty, causing intermittent readings or no readings at all.
- Wiring Issues: Damaged or corroded wiring connections between the sensor/switch and the ECM can disrupt communication.
- Poor Electrical Connections: Loose or poor electrical connections can lead to intermittent signal transmission.
- ECM Malfunction: A malfunctioning ECM may not be able to receive or interpret signals from the sensor/switch correctly.
- Intake Manifold Tuning Valve Malfunction: A malfunctioning intake manifold tuning valve can also trigger the P2079 code.
Symptoms of P2079
- Check Engine Light: The most common symptom associated with the P2079 code is the illumination of the Check Engine Light on the dashboard.
- Rough Idling: The engine may experience rough idling or fluctuating idle speeds due to the intake manifold tuning valve position sensor/switch circuit issue.
- Decreased Fuel Efficiency: A decrease in fuel efficiency may be noticed as the engine struggles to adjust the intake manifold tuning valve properly.
- Engine Stalling: In severe cases, the engine may stall or have difficulty starting due to the malfunctioning sensor/switch circuit.
How to Fix P2079
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and pinpoint the exact cause of the P2079 code.
- Inspect Wiring and Connections: Check the wiring and connections for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test Intake Manifold Tuning Valve Position Sensor/Switch: Test the sensor/switch for proper operation and replace if found to be faulty.
- Clear Codes: Clear the trouble codes from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
- Verify Repair: Use the diagnostic scanner to confirm that the P2079 code has been successfully cleared and that the sensor/switch circuit is functioning properly.
Cost to Fix P2079
The repair costs for addressing the P2079 code can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the cost of replacing the intake manifold tuning valve position sensor/switch and addressing any wiring issues can range from $200 to $500, including parts and labor. Additional costs may apply if other components need to be replaced or if further diagnostics are required. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of the vehicle.
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Code P2079 Information for Specific Makes
- P2079 Dodge — Intake Manifold Tuning Valve Position Sensor/Switch Circuit Intermittent
- P2079 Ford — Intake Manifold Tuning Valve Position Sensor/Switch Circuit Intermittent
- P2079 Lincoln — Intake Manifold Tuning Valve Position Sensor/Switch Circuit Intermittent
- P2079 Mercury — Intake Manifold Tuning Valve Position Sensor/Switch Circuit Intermittent
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