P0446 2015 Chevrolet Silverado Code - Evaporative Emission Vent System Performance
Quick Answer
This Diagnostic Trouble Code (DTC) tests the Evaporative Emission (EVAP) system for a restricted or blocked EVAP vent path that would cause excess amounts of vacuum to be developed in the EVAP system. Common causes include Plugged vapor canister, Pinched or blocked EVAP hose, Faulty Evaporative Emission Vent Solenoid Valve. 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
- P0446 2015 Chevrolet Silverado indicates Evaporative Emission Vent System Performance.
- Common causes
- Common causes include Plugged vapor canister, Pinched or blocked EVAP hose, Faulty Evaporative Emission Vent Solenoid Valve.
- 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 P0446 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0446 2015 Chevrolet Silverado?
- Plugged vapor canister
- Pinched or blocked EVAP hose
- Faulty Evaporative Emission Vent Solenoid Valve
- Evaporative Emission Vent Solenoid Valve harness is open or shorted
- Evaporative Emission Vent Solenoid Valve circuit poor electrical connection
- Faulty Fuel Tank Pressure (FTP) sensor
How to Fix the DTC P0446 2015 Chevrolet Silverado?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0446 2015 Chevrolet Silverado 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 P0446 2015 Chevrolet Silverado Code
1. What does the OBDII code P0446 mean on a 2015 Chevrolet Silverado?
P0446 indicates a malfunction in the evaporative emission (EVAP) vent system, which controls fuel vapor emissions from the gas tank.
2. What are the symptoms of a P0446 code in a 2015 Chevrolet Silverado?
Common symptoms include the check engine light turning on, possible fuel odor near the vehicle, and, in rare cases, difficulty refueling or reduced fuel efficiency.
3. What causes the P0446 code to appear on a 2015 Chevrolet Silverado?
Common causes include a clogged or stuck EVAP vent valve, damaged vent hoses, electrical issues such as a faulty vent valve solenoid, or a failing charcoal canister.
4. Can a loose gas cap cause a P0446 code?
A loose or damaged gas cap is usually associated with other EVAP codes, but it is less likely to trigger a P0446 specifically. However, inspecting the gas cap is still a good first step.
5. How do you diagnose a P0446 code on a 2015 Chevrolet Silverado?
Start by inspecting the EVAP vent valve, hoses, and wiring for damage or clogs. Use a scan tool to test the vent valve's functionality and check for proper voltage.
6. Can I drive my 2015 Chevrolet Silverado with a P0446 code?
Yes, the vehicle is typically safe to drive, but prolonged operation with this code may lead to increased emissions and could prevent passing an emissions test.
7. How do you fix a P0446 code on a 2015 Chevrolet Silverado?
Repairs may include cleaning or replacing the EVAP vent valve, repairing damaged hoses, replacing the charcoal canister, or addressing any electrical issues in the system.
8. What tools are needed to fix a P0446 code on a 2015 Chevrolet Silverado?
You'll need a diagnostic scan tool, a multimeter for electrical testing, and basic tools for removing and inspecting EVAP components.
9. How much does it cost to repair a P0446 code on a 2015 Chevrolet Silverado?
Repair costs vary depending on the issue. Replacing the EVAP vent valve typically costs $100-$300, including parts and labor.
10. Can a faulty purge valve cause a P0446 code?
While the purge valve is part of the EVAP system, a P0446 code usually points to an issue with the vent valve or its related components, not the purge valve.
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