P0499 2017 GMC Sierra Code - Evaporative Emission System Vent Valve Control Circuit High
Quick Answer
The Evaporative Emission (EVAP) Vent Solenoid Valve is located on the EVAP canister and is used to seal the canister vent. Common causes include Faulty Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor connection. 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 Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor connection.
- 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.
Code P0499 2017 GMC Sierra Description
What are the Possible Causes of the DTC P0499 2017 GMC Sierra?
- Faulty Evaporative Emission Vent Solenoid Valve
- Evaporative Emission Vent Solenoid Valve harness is open or shorted
- Evaporative Emission Vent Solenoid Valve electrical circuit poor connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0499 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0499 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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.
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