P0496 on Chevrolet Vehicles
Vapor is being drawn into the engine while purge is commanded off: almost always a purge valve stuck open. P0496 →
9Complaints mentioning the code
#1Rank among 4 brands
0.7%Share of Chevrolet DTC complaints
In NHTSA owner complaints we analyzed for Chevrolet, P0496 was mentioned 9 times.
Notes by brand
P0496 from a purge valve stuck open is a familiar fault on Chevrolet trucks and SUVs as well as several GM cars. The typical story is a long crank or stall right after refueling; replacing the purge solenoid on the intake usually cures it.
Most mentioned models
| Chevrolet Traverse | 7 | |
|---|---|---|
| Chevrolet Sonic | 1 | |
| Chevrolet Trax | 1 |
Model years mentioned
Components named in these complaints
- Fuel/propulsion System (7)
- Engine (3)
- Unknown Or Other (3)
- Power Train (2)
- Electrical System (2)
Often appears together with
P0171
Powertrain
The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees…
Moderate
P0300
Powertrain
The engine computer sees misfires that jump between cylinders or hit several cylinders at once.
High
P0008
Powertrain
Camshaft timing on bank 1 has drifted from the crankshaft. Often a stretched timing chain.
Moderate
P0017
Powertrain
The bank 1 exhaust cam signal doesn't line up with the crankshaft; think chain, exhaust phaser…
Moderate
P0221
Powertrain
The second throttle angle signal leaves its window or stops following the plate, so power…
Moderate
Possible causes
- Purge valve stuck open or leaking past its seat
- Charcoal granules from a breaking canister jamming the new or old purge valve
- Purge valve control wire shorted to ground, holding it open
- Tank pressure sensor drifting toward vacuum, faking the result
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.