P0455 2014 Chevrolet Silverado Code - Evaporative Emission System Large Leak Detected
Quick Answer
The Engine Control Module (ECM) tests the Evaporative Emission (EVAP) system for a large leak or restrictions to the purge path in the EVAP system. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. 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
- P0455 2014 Chevrolet Silverado indicates Evaporative Emission System Large Leak Detected.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- 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 P0455 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0455 2014 Chevrolet Silverado?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Leaking EVAP Canister
- Leaking EVAP System Hose
- Leaking Fuel Tank
- Faulty Fuel Tank Pressure Sensor
How to Fix the DTC P0455 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
There is a factory service bulletin for all the models from 2000 through 2021. The factory states that there are seven critical connections that could likely lead to this DTC being set:
1. Purge tube to purge valve (at intake manifold)
2. Purge tube to chassis EVAP line (at the rear of the engine, near transmission)
3. Chassis EVAP line to canister (at canister)
4. Fuel tank load line to canister (at canister)
5. Vent valve line to vent valve (at vent valve)
6. Fuel tank load line jumper connection (near fuel tank)
7. Fuel tank cap is closed properly (at refuel compartment)
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0455 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 P0455 2014 Chevrolet Silverado code?
Need more information on how to fix the P0455 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
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Frequently Asked Questions about P0455 2014 Chevrolet Silverado Code
1. What does OBDII code P0455 mean for a 2014 Chevrolet Silverado?
The code P0455 indicates that the vehicle's onboard diagnostic system has detected a large leak in the evaporative emission control system.
2. What are the common symptoms of a P0455 code in a Chevrolet Silverado?
Common symptoms of a P0455 code include the check engine light illuminating, a strong fuel odor around the vehicle, and potential issues with the vehicle's fuel economy.
3. What are the possible causes of a P0455 code in a 2014 Chevrolet Silverado?
The most common causes of a P0455 code in a Chevrolet Silverado include a loose or damaged gas cap, a leaking purge valve, a cracked EVAP canister, or damaged EVAP hoses.
4. How serious is a P0455 code in a Chevrolet Silverado?
While a P0455 code may not cause immediate drivability issues, it is important to address it promptly as it can lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the vehicle's emission control system.
5. How can I diagnose a P0455 code in my Chevrolet Silverado?
Diagnosing a P0455 code typically involves inspecting the gas cap for tightness, visually checking the EVAP system components for damage or leaks, and using a smoke machine to pinpoint the location of the leak.
6. Can I continue driving my Chevrolet Silverado with a P0455 code?
It is generally safe to drive your Silverado with a P0455 code in the short term, but it is recommended to address the issue as soon as possible to prevent potential negative impacts on emissions and fuel economy.
7. How do I clear a P0455 code on my 2014 Chevrolet Silverado?
You can clear a P0455 code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is important to note that clearing the code without fixing the underlying issue will not solve the problem.
8. What are some tips for repairing a P0455 code in a Chevrolet Silverado?
Repairing a P0455 code often involves tightening or replacing the gas cap, inspecting and repairing damaged EVAP system components, and clearing the code to see if it returns after the repair.
9. Can a P0455 code in a Chevrolet Silverado be fixed at home?
Depending on the cause of the P0455 code, some DIY enthusiasts may be able to address the issue at home by checking and tightening the gas cap, inspecting hoses for damage, or replacing faulty components like the purge valve.
10. How much does it cost to repair a P0455 code in a 2014 Chevrolet Silverado?
The cost of repairing a P0455 code can vary depending on the cause of the issue and whether you choose to address it yourself or take it to a professional mechanic. Costs may range from a simple gas cap replacement to more extensive repairs involving EVAP system components.
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