P0455 2015 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 2015 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 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0455 2015 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 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
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 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.
Need more information about the P0455 2015 Chevrolet Silverado code?
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Frequently Asked Questions about P0455 2015 Chevrolet Silverado Code
What does the OBDII code P0455 mean for a 2015 Chevrolet Silverado?
Code P0455 indicates a large leak in the evaporative emission (EVAP) system, which is designed to prevent fuel vapors from escaping into the atmosphere.
What are common symptoms of a P0455 code in a 2015 Chevrolet Silverado?
Common symptoms include the check engine light turning on, a potential smell of fuel near the vehicle, and possibly reduced fuel efficiency.
What causes the P0455 code in a 2015 Chevrolet Silverado?
Typical causes include a loose or damaged gas cap, a cracked or disconnected EVAP hose, a faulty purge or vent valve, or a leak in the EVAP system components such as the charcoal canister.
How can I fix the P0455 code on my 2015 Chevrolet Silverado?
Start by inspecting and tightening the gas cap, checking EVAP hoses for cracks or disconnections, and testing purge and vent valves. Replace any damaged components as needed.
Can I drive my 2015 Chevrolet Silverado with a P0455 code?
Yes, but it’s recommended to address the issue promptly. While it may not affect immediate drivability, the vehicle may release harmful emissions and fail an emissions test.
How do I know if the gas cap is causing the P0455 code?
Inspect the gas cap for cracks or damage, ensure it’s tightened securely, and consider replacing it with a new OEM cap if it’s worn or faulty.
What tools are needed to diagnose a P0455 code on a 2015 Chevrolet Silverado?
Basic tools include an OBDII scanner, a smoke machine to detect leaks, and a multimeter to test EVAP components like purge and vent valves.
How much does it cost to repair a P0455 code on a 2015 Chevrolet Silverado?
Repair costs depend on the cause. A replacement gas cap may cost $20-$50, while fixing EVAP leaks or replacing valves can range from $100-$400, excluding labor.
Can a faulty purge valve cause the P0455 code on a 2015 Chevrolet Silverado?
Yes, if the purge valve is stuck open or closed, it can prevent the EVAP system from functioning properly, leading to a large leak detection.
How can I prevent the P0455 code from occurring on my 2015 Chevrolet Silverado?
Regularly inspect the gas cap, EVAP hoses, and system components for wear or damage, and ensure proper maintenance of the vehicle’s emissions system.
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