P0446 2014 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 2014 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 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0446 2014 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 2014 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 2014 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.
Need more information about the P0446 2014 Chevrolet Silverado code?
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Frequently Asked Questions about P0446 2014 Chevrolet Silverado Code
1. What does OBDII code P0446 on a 2014 Chevrolet Silverado indicate?
Code P0446 on a 2014 Chevrolet Silverado points to a problem with the Evaporative Emission Vent System Performance.
2. What are common symptoms of a P0446 code on a 2014 Chevrolet Silverado?
Common symptoms include the check engine light coming on, rough idling, decreased fuel efficiency, and a gasoline smell near the vehicle.
3. What are the possible causes of a P0446 code on a 2014 Chevrolet Silverado?
Potential causes include a faulty vent valve, damaged vent hoses, a malfunctioning charcoal canister, or issues with the evaporative emission system pressure sensor.
4. How can I diagnose a P0446 code on my 2014 Chevrolet Silverado?
Diagnosis typically involves checking the vent valve operation, inspecting the vent system components for damage, testing the charcoal canister, and verifying the integrity of the system hoses.
5. Can a loose gas cap trigger a P0446 code on a 2014 Chevrolet Silverado?
While a loose gas cap can sometimes cause an evaporative emission system code, P0446 specifically relates to vent system performance issues rather than a loose gas cap.
6. Is it safe to continue driving with a P0446 code on my 2014 Chevrolet Silverado?
While the vehicle may still be operable with a P0446 code, it's recommended to address the issue promptly to prevent potential damage to the evaporative emission system and ensure optimal performance.
7. How can I clear a P0446 code on my 2014 Chevrolet Silverado?
Clearing the code can be done using an OBDII scanner, but it's crucial to diagnose and resolve the underlying issue causing the P0446 code to prevent it from reoccurring.
8. Can I fix a P0446 code on a 2014 Chevrolet Silverado myself?
Depending on your mechanical skill level, you may be able to address the P0446 code yourself by replacing the faulty vent valve, inspecting and repairing damaged hoses, or checking the charcoal canister for issues.
9. Will a P0446 code cause my 2014 Chevrolet Silverado to fail an emissions test?
Yes, a P0446 code typically indicates an evaporative emissions control system problem, which can cause your vehicle to fail an emissions test.
10. How much does it cost to repair a P0446 code on a 2014 Chevrolet Silverado?
The cost of repairs for a P0446 code can vary based on the specific issue causing the code, but it may involve part replacements, which could range from $100 to $300 or more depending on the components needed.
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