Intake Manifold Tuning Valve Position Sensor Circuit Intermittent (Bank 1)
The P2079 code indicates an intermittent signal from the intake manifold tuning (IMT) valve position sensor on bank 1. This sensor monitors the position of the IMT valve, which adjusts intake runner length for optimal performance. An intermittent fault suggests a loose connection, damaged wiring, or a failing sensor, leading to erratic engine behavior.
01. Most Common Causes
- Faulty IMT valve position sensor
- Damaged or corroded wiring/connector
- Loose electrical connection
- Carbon buildup on IMT valve
02. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine power or hesitation
- Poor fuel economy
- Rough idle or stalling
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect IMT valve connector and wiring for damage or corrosion.
Step 3: Test sensor resistance and voltage with a multimeter per manufacturer specs.
Step 4: Check for intermittent signal by wiggling wiring harness while monitoring scan tool data.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the engine may experience reduced power or stalling, which can be unsafe.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for parts and labor, depending on whether the sensor or wiring needs replacement.