P2421 on Volkswagen vehicles
P2421 is named on 19 Volkswagen model years (2017–2024): 96 manufacturer filings and 4 owner reports in NHTSA’s files, across Golf / GTI, Jetta, Atlas, Taos, Tiguan and 1 more.
Which Volkswagen model years name P2421
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Volkswagen Golf / GTI | Equipment | 12 | — |
| 2020 Volkswagen Golf / GTI | Equipment | 12 | — |
| 2018 Volkswagen Golf / GTI | Electrical System | 12 | — |
| 2017 Volkswagen Golf / GTI | Equipment | 12 | — |
| 2021 Volkswagen Jetta | Engine | 6 | — |
| 2020 Volkswagen Jetta | Equipment | 6 | — |
| 2018 Volkswagen Jetta | Engine | 5 | — |
| 2017 Volkswagen Jetta | Equipment | 5 | — |
| 2023 Volkswagen Atlas | Seat Belts | 4 | — |
| 2022 Volkswagen Atlas | Seats | 4 | — |
| 2022 Volkswagen Taos | Fuel/Propulsion System | 2 | 2 |
| 2021 Volkswagen Tiguan | Electrical System | 4 | — |
| 2023 Volkswagen Taos | Seats | 2 | 1 |
| 2023 Volkswagen ID.4 | Engine | 2 | — |
| 2023 Volkswagen Jetta | Seat Belts | 2 | — |
| 2023 Volkswagen Tiguan | Seats | 2 | — |
| 2022 Volkswagen Jetta | Seat Belts | 2 | — |
| 2022 Volkswagen Tiguan | Electrical System | 2 | — |
| 2024 Volkswagen Jetta | Fuel/Propulsion System | — | 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.
What Volkswagen owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
In September 2022, a Volkswagen dealer documented code P2421 for an EVAP system vent valve stuck open and performed a software update
Upon using an OBD-II code reader, it gave the code: P2421 - EVAP Vent Valve stuck open
Volkswagen filings that name P2421
Source: NHTSA manufacturer communicationsBulletins and campaigns Volkswagen filed with NHTSA whose summary names P2421. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- VIN4APIN20201120 Service bulletin2020-11-20 · Equipment — Other — Owners/Service/Other Manual
- Customer states MIL-on with P0556 "Customer states MIL-on with P11A1/P11A2/P11A3/P11A4/P11A5/P11A6/P11A7/P11A8/ P11A9/P11AA/P11AB/P11AC/P11AD/P11AE/P11AF/P11B0" Customer states MIL-on with P2421 Customer states MIL-on, HPFP mounting bolts loose/broken Customer states MIL-on with Misfire code Customer states clutch pedal makes noise No crank, no start Customer states seat memory inoperative
- VIN4APIN20201201 Service bulletin2020-12-01 · Equipment
- Customer states MIL-on with P0556 Customer states MIL-on with P2421 Customer states MIL-on with Misfire code Customer states clutch pedal makes noise No crank, no start Customer states seat memory inoperative Customer states fuel odor/leak in the rear part of the vehicle (without a punctured fuel tank, hoses or pipes) or difficulty fueling fuel tank or fuel coming back up filler neck
- VIN4APIN20201210 Service bulletin2020-12-10 · Engine
- Customer states MIL-on with P0556 Customer states MIL-on with P2421 Customer states MIL-on with Misfire code Customer states clutch pedal makes noise No crank, no start Customer states no voice output during calls / micro phone inoperative Customer states seat memory inoperative Customer states fuel odor/leak in the rear part of the vehicle (without a punctured fuel tank, hoses or pipes) or
- VIN4APIN20210104 Service bulletin2021-01-04 · Electrical System
- Customer states MIL-on with P0556 Customer states MIL-on with P2421 Customer states MIL-on with Misfire code Customer states clutch pedal makes noise No crank, no start Customer states no voice output during calls / micro phone inoperative Customer states fuel odor/leak in the rear part of the vehicle (without a punctured fuel tank, hoses or pipes) or difficulty fueling fuel tank or fuel com
- VIN4APIN20230824 Service bulletin2023-08-24 · Seat Belts
- Customer states MIL-on, P2421 stored in ECM memory Customer states MIL-on, P2402 stored in ECM memory Customer states rattle from below the vehicle Customer states MIL-on, fault P04F0 stored in ECM memory Customer states MIL-on, fault P0456 and/or P0442 stored in ECM memory Customer states sun visor is loose/broken Customer states seat memory is inoperative Customer states key FOB lock/unlo
- VIN4APIN20230912 Service bulletin2023-09-12 · Seats
- Customer states MIL-on, P2421 stored in ECM memory Customer states MIL-on, P2402 stored in ECM memory Customer states rattle from below the vehicle Customer states MIL-on, fault P04F0 stored in ECM memory Customer states MIL-on, fault P0461 stored in ECM memory Customer states noise while driving Customer states sun visor is loose/broken Customer states seat memory is inoperative Customer
- VIN4APIN20210114 Service bulletin2021-01-14 · Electrical System
- Customer states MIL-on with P0556 Customer states MIL-on with P2421 Customer states MIL-on with Misfire code Customer states clutch pedal makes noise No crank, no start Customer states no voice output during calls / micro phone inoperative Customer states fuel odor/leak in the rear part of the vehicle (without a punctured fuel tank, hoses or pipes) or difficulty fueling fuel tank or fuel com
- VIN4APIN20210121 Service bulletin2021-01-21 · Fuel System, Other
- Customer states MIL-on with P2421 Customer states MIL-on with Misfire code Customer states clutch pedal makes noise No crank, no start Customer states no voice output during calls / micro phone inoperative Customer states fuel odor/leak in the rear part of the vehicle (without a punctured fuel tank, hoses or pipes) or difficulty fueling fuel tank or fuel coming back up filler neck
What P2421 means
Source: SAE J2012 / OBD-IIP2421 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. The record above is what Volkswagen 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 P2421 a known problem on Volkswagen vehicles?
It is a documented one: NHTSA's files hold 96 manufacturer filings and 4 owner reports naming P2421 on 19 Volkswagen model years (2017–2024). 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 Volkswagen models does P2421 appear on most?
2021 Golf / GTI (12 documents), 2020 Golf / GTI (12 documents), 2018 Golf / GTI (12 documents).
Does P2421 on a Volkswagen 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.