P0449 on Chevrolet vehicles A fault in the evaporative vent valve or solenoid circuit
P0449 is named on 20 Chevrolet model years (2019–2025): 84 manufacturer filings and 2 owner reports in NHTSA’s files, across Silverado, Silverado 2500HD, Silverado 3500HD, Trax.
Which Chevrolet model years name P0449
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2019 Chevrolet Silverado | Engine | 5 | 1 |
| 2024 Chevrolet Silverado 2500HD | Engine | 5 | — |
| 2024 Chevrolet Silverado 3500HD | Engine | 5 | — |
| 2023 Chevrolet Silverado | Engine | 5 | — |
| 2023 Chevrolet Silverado 2500HD | Engine | 5 | — |
| 2023 Chevrolet Silverado 3500HD | Engine | 5 | — |
| 2022 Chevrolet Silverado | Engine | 5 | — |
| 2022 Chevrolet Silverado 2500HD | Engine | 5 | — |
| 2022 Chevrolet Silverado 3500HD | Engine | 5 | — |
| 2021 Chevrolet Silverado | Engine | 5 | — |
| 2021 Chevrolet Silverado 2500HD | Engine | 5 | — |
| 2021 Chevrolet Silverado 3500HD | Engine | 5 | — |
| 2020 Chevrolet Silverado | Engine | 5 | — |
| 2020 Chevrolet Silverado 2500HD | Engine | 5 | — |
| 2020 Chevrolet Silverado 3500HD | Engine | 5 | — |
| 2024 Chevrolet Silverado | Engine | 3 | — |
| 2025 Chevrolet Silverado | Engine | 2 | — |
| 2025 Chevrolet Silverado 2500HD | Engine | 2 | — |
| 2025 Chevrolet Silverado 3500HD | Engine | 2 | — |
| 2019 Chevrolet Trax | Engine | — | 1 |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Chevrolet filings that name P0449
Source: NHTSA manufacturer communicationsBulletins and campaigns Chevrolet filed with NHTSA whose summary names P0449. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 23-NA-073 Service bulletin2023-06-19 · Engine And Engine Cooling
- This technical bulletin provides repair information to correct a customer concern of Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative Canister.
- 23-NA-073 Service bulletin2023-09-20 · Engine And Engine Cooling
- This technical bulletin provides repair information to correct a customer concern of Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative Canister.
- 23-NA-073 Service bulletin2024-02-26 · Engine And Engine Cooling
- This technical bulletin provides repair information to correct a customer concern of Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative Canister.
- 23-NA-073 Service bulletin2024-10-07 · Engine
- This technical bulletin provides repair information to correct a customer concern of Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative Canister.
- 23-NA-073 Service bulletin2025-03-13 · Engine
- This technical bulletin provides repair information to correct a customer concern of Evaporative DTCs P0442, P0446, P0455 or P0449, Caused by Dust Intrusion into the Evaporative Canister.
What P0449 means
Source: SAE J2012 / OBD-IIA fault in the evaporative vent valve or solenoid circuit.
A stored code names the test that failed, never the part that caused it. The record above is what Chevrolet and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P0449 a known problem on Chevrolet vehicles?
It is a documented one: NHTSA's files hold 84 manufacturer filings and 2 owner reports naming P0449 on 20 Chevrolet model years (2019–2025). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Chevrolet models does P0449 appear on most?
2019 Silverado (6 documents), 2023 Silverado (5 documents), 2022 Silverado (5 documents).
Does P0449 on a Chevrolet mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.