P0499 Chevrolet 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 Chevrolet 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 Chevrolet Description
What are the Possible Causes of the DTC P0499 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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.
Need more information about the P0499 Chevrolet code?
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Information for Specific Chevrolet Models
- P0499 2014 Chevrolet Silverado — Evaporative Emission System Vent Valve Control Circuit High
- P0499 2015 Chevrolet Silverado — Evaporative Emission System Vent Valve Control Circuit High
- P0499 2016 Chevrolet Silverado — Evaporative Emission System Vent Valve Control Circuit High
- P0499 2017 Chevrolet Silverado — Evaporative Emission System Vent Valve Control Circuit High
- P0499 2018 Chevrolet Silverado — Evaporative Emission System Vent Valve Control Circuit High
Frequently Asked Questions about P0499 Chevrolet Code
What does the OBDII code P0499 mean on a Chevrolet?
P0499 indicates a problem with the Evaporative Emission (EVAP) System Vent Valve Control Circuit, specifically that the circuit's voltage is higher than expected.
What are common symptoms of P0499 on a Chevrolet?
Symptoms may include an illuminated check engine light, poor fuel economy, difficulty fueling the vehicle, or a noticeable fuel odor near the vehicle.
What causes the P0499 code to appear on a Chevrolet?
Common causes include a faulty EVAP vent valve, damaged wiring or connectors in the vent valve circuit, a malfunctioning powertrain control module (PCM), or a clogged or restricted vent valve.
How can I diagnose the P0499 code on my Chevrolet?
Diagnosis typically involves checking the EVAP vent valve for proper operation, inspecting the circuit's wiring and connectors for damage, and using a scan tool to monitor live data and perform system tests.
Can I drive my Chevrolet with the P0499 code active?
While the vehicle may still be drivable, prolonged operation with this code can lead to increased emissions and potential damage to the EVAP system. It’s best to address the issue promptly.
How do I fix the P0499 code on a Chevrolet?
Repairs may include replacing the EVAP vent valve, repairing or replacing damaged wiring or connectors in the circuit, or reprogramming or replacing the PCM if necessary.
Where is the EVAP vent valve located on a Chevrolet?
The EVAP vent valve is typically located near the fuel tank or along the EVAP system's vent path. Refer to the vehicle's service manual for the exact location.
What tools are needed to fix the P0499 code?
You may need a diagnostic scan tool, a multimeter to check electrical connections, basic hand tools for removal and replacement, and potentially a smoke machine to test the EVAP system for leaks.
How much does it cost to repair the P0499 code on a Chevrolet?
Repair costs can vary but typically range from $100 to $300, depending on whether the vent valve, wiring, or other components need replacement.
Can the P0499 code clear itself on a Chevrolet?
The code may temporarily clear if the issue is intermittent, but it is likely to return until the underlying problem is resolved.
Discuss the causes and fixes for P0499 Chevrolet OBDII Code
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