What Does P2079 Mean?
The PCM is detecting an intermittent signal from the intake manifold tuning valve position sensor on Bank 1. The sensor signal is sporadically dropping out or becoming erratic, indicating a loose connection or failing component.
Common Causes
40%
Loose or intermittently failing sensor connector
25%
Intermittent wiring short or open due to harness movement
20%
Failing IMT position sensor with intermittent internal fault
10%
Intermittent ground connection fault
5%
Vibration-induced sensor or wiring issue
Diagnostic Steps
1
Step 1: Wiggle test all wiring and connectors while monitoring sensor signal on scan tool
2
Step 2: Inspect connector terminals for looseness, corrosion, or damaged locking tabs
3
Step 3: Check for proper routing and securing of sensor wiring harness
4
Step 4: Monitor sensor voltage during engine vibration and temperature changes
5
Step 5: Test for intermittent resistance changes in sensor circuit under movement conditions
Estimated Repair Cost
$120 - $550
Parts + labor, varies by vehicle and location
The PCM is detecting an intermittent signal from the intake manifold tuning valve position sensor on Bank 1. The sensor signal is sporadically dropping out or becoming erratic, indicating a loose connection or failing component.
The most common cause of P2079 (Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Intermittent Bank 1) is: Loose or intermittently failing sensor connector
Typical repair costs for P2079 range from $120 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive with caution. Intermittent operation may cause unexpected performance changes or hesitation, but does not pose immediate safety risks.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2079 to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Air Induction / Variable Intake System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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