P0499 2017 GMC Sierra Code - Evaporative Emission System Vent Valve Control Circuit High
Quick Answer
The P0499 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the evaporative emission system vent valve control circuit being too high. Common causes include Faulty Vent Valve: The vent valve itself may be malfunctioning, causing the control circuit to register as high, Damaged Wiring: Wiring connected to the vent valve control circuit may be damaged or corroded, leading to an increase in voltage, Faulty Control Module: The control module that regulates the vent valve operation may be faulty, causing the circuit to read high. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0499 2017 GMC Sierra indicates Evaporative Emission System Vent Valve Control Circuit High.
- Common causes
- Common causes include Faulty Vent Valve: The vent valve itself may be malfunctioning, causing the control circuit to register as high, Damaged Wiring: Wiring connected to the vent valve control circuit may be damaged or corroded, leading to an increase in voltage, Faulty Control Module: The control module that regulates the vent valve operation may be faulty, causing the circuit to read high.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0499 2017 GMC Sierra Description
The P0499 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the evaporative emission system vent valve control circuit being too high. The evaporative emission system is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from being released into the atmosphere. The vent valve controls the flow of these vapors to the engine for combustion.
Common Causes of P0499 2017 GMC Sierra
- Faulty Vent Valve: The vent valve itself may be malfunctioning, causing the control circuit to register as high.
- Damaged Wiring: Wiring connected to the vent valve control circuit may be damaged or corroded, leading to an increase in voltage.
- Faulty Control Module: The control module that regulates the vent valve operation may be faulty, causing the circuit to read high.
- Vacuum Leaks: Any leaks in the vacuum system that connects to the evaporative emission system can also trigger this code.
- Electrical Issues: Other electrical problems within the system, such as a short circuit or a blown fuse, can cause the circuit to register high.
Symptoms of P0499 2017 GMC Sierra
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Rough Idle: A high vent valve control circuit can cause the engine to idle roughly or inconsistently.
- Decreased Fuel Efficiency: The vehicle may experience a decrease in fuel efficiency due to improper vent valve operation.
- Strong Fuel Smell: A strong smell of fuel, especially near the fuel tank area, can indicate a problem with the evaporative emission system.
- Failed Emissions Test: If the vehicle is subjected to an emissions test, it may fail due to increased emissions caused by this issue.
How to Fix P0499 2017 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and further investigate the specific cause of the high vent valve control circuit.
- Inspect Wiring: Check the wiring connected to the vent valve for any damage or corrosion. Repair or replace as needed.
- Test Vent Valve: Test the vent valve itself to ensure it is functioning properly. Replace if necessary.
- Check Control Module: Inspect the control module for any signs of damage or malfunction. Replace if needed.
- Clear Codes: After making repairs, clear the DTC using the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0499 2017 GMC Sierra
The typical repair costs for addressing a P0499 code on a 2017 GMC Sierra can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor in your area. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.
Need more information about the P0499 2017 GMC Sierra code?
Need more information on how to fix the P0499 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0499 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0499 2017 GMC Sierra Code
1. What does the OBDII code P0499 mean on a 2017 GMC Sierra?
P0499 indicates a problem with the evaporative emission system (EVAP) vent valve control circuit, specifically a high voltage issue.
2. What are the common symptoms of code P0499 in a 2017 GMC Sierra?
Symptoms may include an illuminated check engine light, a noticeable fuel odor, difficulty refueling, and failed emissions tests.
3. What causes the P0499 code to appear on a 2017 GMC Sierra?
Common causes include a faulty EVAP vent valve, damaged wiring or connectors in the vent valve circuit, or a malfunctioning PCM.
4. Can code P0499 cause drivability issues in my 2017 GMC Sierra?
Typically, P0499 does not cause drivability issues but may lead to increased emissions or difficulty refueling.
5. How do I diagnose the P0499 code on a 2017 GMC Sierra?
Diagnosis involves inspecting the EVAP vent valve, checking for damaged wiring or corroded connectors, and using a multimeter to test the circuit voltage.
6. Is it safe to drive my 2017 GMC Sierra with the P0499 code?
Yes, it’s generally safe to drive, but you should address the issue promptly to avoid potential emissions problems or further damage.
7. How do I fix the P0499 code on a 2017 GMC Sierra?
Repairs may include replacing the EVAP vent valve, repairing or replacing damaged wiring, or cleaning corroded connectors in the vent valve circuit.
8. How much does it cost to fix the P0499 code on a 2017 GMC Sierra?
Repair costs can vary but typically range from $150 to $300, depending on whether you replace the vent valve or address wiring issues.
9. Can a loose gas cap cause the P0499 code on a 2017 GMC Sierra?
No, a loose gas cap typically causes a different EVAP-related code, such as P0455 or P0442, not P0499.
10. Do I need to reset the check engine light after fixing code P0499 on a 2017 GMC Sierra?
Yes, after completing repairs, clear the code using an OBDII scanner. If the issue is fixed, the light should stay off.
Discuss the causes and fixes for P0499 2017 GMC Sierra OBDII Code
Code P0499 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.