P0079: Exhaust Valve Control Solenoid Circuit Low Bank 1
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA complaint patterns, then kept at generic code level because this page is not scoped to one make or model.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P0079.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What Does P0079 Mean?
P0079 code: Exhaust Valve Control Solenoid Circuit Low Bank 1. Symptoms, likely causes, diagnostic path, severity, and repair cost context.
Symptoms of P0079
- ⚠️ Warning light or diagnostic trouble code is stored
- ⚠️ Symptoms vary by vehicle and by the system that set the code
- ⚠️ Related codes, freeze-frame data, and live data are needed before replacing parts
- ⚠️ Vehicle may fail an emissions or safety inspection until the code is resolved and monitors reset
Common Causes
- 🔍 Circuit, sensor, actuator, wiring, connector, module, or mechanical condition detected by the relevant control module
- 🔍 Low battery voltage, poor ground, corrosion, water intrusion, or intermittent connector contact
- 🔍 Vehicle-specific calibration or service bulletin condition that must be checked by VIN
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The contact owns a 2015 Kia Optima. The contact stated while driving approximately 65 MPH, the check engine warning light illuminated. The contact stated that the vehicle started to lose motive power. The contact pulled off the roadway and heard an abnormal grinding sound coming from underneath the "
— Kia Optima owner, 2025-05-12
Source: NHTSA Complaints Database
Most Reported Vehicles for P0079
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | KIA OPTIMA |
Frequently Asked Questions
Is P0079 enough to replace a part?
Can I drive with P0079?
What To Do Next
-
1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
-
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
-
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.