P0449 on Chevrolet Vehicles: EVAP Vent Valve/Solenoid Circuit
Electrical fault on the canister vent solenoid circuit, a staple on GM trucks with the solenoid by the tank. P0449 →
8Complaints mentioning the code
#1Rank among 3 brands
0.6%Share of Chevrolet DTC complaints
In NHTSA owner complaints we analyzed for Chevrolet, P0449 was mentioned 8 times.
Notes by brand
Silverado, Tahoe, Suburban and Avalanche mount the vent solenoid on the canister at the rear of the frame. Mud packing and corrosion there make P0449, often with P0446 or P0455, one of the most common EVAP complaints on these trucks.
Most mentioned models
| Chevrolet Hhr Panel | 1 | |
|---|---|---|
| Chevrolet Impala | 1 | |
| Chevrolet Malibu Eco | 1 | |
| Chevrolet Malibu Hybrid | 1 | |
| Chevrolet Silverado 1500 | 1 | |
| Chevrolet Tahoe | 1 |
Model years mentioned
Components named in these complaints
- Fuel/propulsion System (3)
- Engine (3)
- Electronic Stability Control (esc) (2)
- Electrical System (2)
- Engine And Engine Cooling (1)
Often appears together with
P0455
Powertrain
The fuel vapor system can't hold vacuum at all — check the gas cap first, then hoses and valves.
Low
P0010
Powertrain
The PCM found an electrical fault in the intake cam phaser solenoid circuit on bank 1, not…
Low
P0011
Powertrain
The bank 1 intake cam sits further advanced than the PCM asked for, usually an oil or control…
Moderate
P0013
Powertrain
Electrical fault in the bank 1 exhaust cam phaser solenoid circuit; the exhaust cam stays…
Low
P0171
Powertrain
The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees…
Moderate
Possible causes
- Vent solenoid coil failed, often after water and mud intrusion
- Corroded connector or terminals at the solenoid on the frame
- Harness chafed on the frame or tank strap and shorted to ground
- Vent inlet or filter packed with mud or spider webs, seizing the solenoid
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.