What is OBD-II Code P0079 – Exhaust Valve Control Solenoid Circuit Low Bank 1
Have you ever encountered the check engine light appearing on your car’s dashboard? This warning light means that there is a problem with one or more components of your vehicle’s system. To diagnose the problem accurately, professional mechanics use an On-Board Diagnostics system, also known as OBD-II. OBD-II scans your car and retrieves Diagnostic Trouble Codes (DTCs), which are alphanumeric codes indicating where the problem lies. One of the codes that commonly appears is P0079, which indicates a malfunctioning Exhaust Valve Control Solenoid Circuit Low Bank 1. This article aims to provide an explanation of this code and how to fix it.
Understanding OBD-II Code P0079 – Exhaust Valve Control Solenoid Circuit Low Bank 1
The Exhaust Valve Control Solenoid Circuit Low Bank 1 is a vital part of your car’s engine system. Its function is to regulate the airflow through the engine’s exhaust system, which enhances combustion efficiency and maximizes power output while minimizing fuel consumption. If the circuit fails or malfunction, it will affect the engine’s performance, leading to reduced fuel efficiency and power output.
The P0079 code is triggered when the Exhaust Valve Control Solenoid Circuit Low Bank 1’s voltage level is below the manufacturer’s preset limit for an extended period. The Engine Control Module (ECM) detects the low voltage and activates the check engine light as a warning sign. When this occurs, it’s essential to have your car inspected by an expert mechanic to determine the cause of the problem.
Causes of P0079 Code
Several issues can cause the malfunctioning Exhaust Valve Control Solenoid Circuit Low Bank 1, including:
1. Failed Solenoid Valve: The solenoid valve is the principal component of the Exhaust Valve Control Solenoid Circuit. A malfunctioning valve will not control the airflow, leading to low voltage and triggering the P0079 code.
2. Wiring Issues: Wiring faults like short circuits, open circuits or loose connections can inhibit the flow of electric current, causing a low voltage in the Exhaust Valve Control Solenoid Circuit.
3. Faulty ECM: The ECM controls various functions in your car, including the Exhaust Valve Control Solenoid Circuit. If it is malfunctioned or faulty, it can result in a low voltage in the circuit.
4. Circuit Issues: Over time, the circuitry may be damaged or eroded through corrosion or normal wear and tear. This could also result in a low voltage in the Exhaust Valve Control Solenoid Circuit.
Symptoms of P0079 Code
When the check engine light appears on your dashboard, it means that there is an issue with one of your car’s systems. Other symptoms of P0079 code include:
1. Reduced fuel efficiency.
2. Reduced power output.
3. Rough idling.
4. The engine won’t start.
5. The engine stalls or misfires.
Fixing P0079 Code
To fix the P0079 code, it’s essential to inspect the Exhaust Valve Control Solenoid Circuit and its components thoroughly. Here are some common remedies to solve the problem:
1. Fix Wiring Issues: If wiring issues are the cause of the code, expert mechanics will repair or replace it.
2. Replace the Solenoid Valve: If the solenoid valve is faulty or malfunctioned, it will need to be replaced with a new one.
3. Replace Faulty ECM: If the ECM is the cause of the problem, the mechanic will replace it with a new one.
4. Repair Circuit Issues: If the Exhaust Valve Control Solenoid Circuit’s circuit is damaged or eroded, it will need to be repaired.
Frequently Asked Questions (FAQs)
Q1. What happens if I ignore the P0079 code?
Ignoring the P0079 code can lead to reduced fuel economy, reduced power output, rough idling, engine stalling, or misfiring. Therefore, it’s essential to have your car inspected by a professional mechanic if the check engine light comes on.
Q2. Can I fix P0079 Code myself?
It is not advisable to fix the P0079 code yourself as it requires specific diagnostic tools and skills. Consult a professional mechanic to ensure your car’s systems are diagnosed and repaired correctly.
Q3. What causes the Exhaust Valve Control Solenoid Circuit to malfunction?
The Exhaust Valve Control Solenoid Circuit can malfunction due to various reasons, including failed solenoid valve, wiring issues, faulty ECM, and circuit issues.
Q4. Can I drive with the P0079 code?
Driving your car with the P0079 code on can lead to more significant problems with your engine system, including stalling, misfires, or reduced fuel economy. It’s essential to have your vehicle inspected by a professional mechanic to diagnose the issue and fix it.
Q5. Are there any precautions I should follow to avoid the P0079 code?
Regularly servicing your car and checking the Exhaust Valve Control Solenoid Circuit’s wiring and components can prevent the P0079 code. It’s also advisable to use high-quality parts and components during repairs or replacements.
Conclusion
The P0079 code indicates a malfunctioning Exhaust Valve Control Solenoid Circuit Low Bank 1, which affects the engine’s performance, leading to reduced fuel efficiency and power output. The underlying causes of the code include wiring issues, faulty ECM, circuit issues, or a failed solenoid valve. To fix the code, it’s essential to inspect the Exhaust Valve Control Solenoid Circuit and its components. Regularly servicing your car and using high-quality parts can prevent the P0079 code. Neglecting the code can lead to more significant problems with your engine system, including stalling and misfires. Consult a professional mechanic to diagnose and fix the issue accurately.