P0455 on Chevrolet Vehicles: EVAP System Leak Detected (Large Leak)
The fuel vapor system can't hold vacuum at all — check the gas cap first, then hoses and valves. P0455 →
9Complaints mentioning the code
#1Rank among 13 brands
0.7%Share of Chevrolet DTC complaints
In NHTSA owner complaints we analyzed for Chevrolet, P0455 was mentioned 9 times.
Notes by brand
On Silverado, Sierra and other GM trucks and SUVs, the canister vent solenoid sits under the vehicle near the canister and is exposed to mud and water; a sticking vent solenoid is a frequent cause of P0455 and P0446 on these trucks.
Most mentioned models
| Chevrolet Suburban 2500 | 2 | |
|---|---|---|
| Chevrolet Corvette Zr1 | 1 | |
| Chevrolet Equinox | 1 | |
| Chevrolet Impala | 1 | |
| Chevrolet Silverado | 1 | |
| Chevrolet Silverado 2500 | 1 |
Model years mentioned
Components named in these complaints
- Fuel/propulsion System (5)
- Engine (3)
- Electrical System (2)
- Power Train (2)
- Electronic Stability Control (esc) (1)
Often appears together with
P0449
Powertrain
Electrical fault on the canister vent solenoid circuit, a staple on GM trucks with the solenoid…
Low
P0010
Powertrain
The PCM found an electrical fault in the intake cam phaser solenoid circuit on bank 1, not…
Low
P0122
Powertrain
The throttle position signal fell to nearly 0 volts, lower than a closed throttle could ever…
Moderate
P0202
Powertrain
Injector 2's circuit is open or out of range; on an inline-four it's a middle cylinder under…
Moderate
P0335
Powertrain
The engine computer lost the crankshaft position signal. Expect stalling or a crank-no-start.
High
Possible causes
- Gas cap loose, missing, the wrong type or with a failed seal
- Canister vent valve stuck open from dirt, water or corrosion
- EVAP hose or filler-neck vent line disconnected or cracked through
- Purge valve stuck closed or purge line blocked (engine-running tests); stuck open on engine-off pump tests
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.