Volkswagen bulletin 48A2
What it saysEngine/Motor Control Module J623 Update Programing for low or no heat in cold weather NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated May 2, 2025, received Feb 6, 2025, about the engine — 3 documents under this number: V0122032066602_4, V0122032066602_3, V0122032066602_2. It names 2 model years (2020–2021). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationEngine/Motor Control Module J623 Update Programing for low or no heat in cold weather
Trouble codes it names: P013E P0441 P0496 P04F0 P060C P148D P2421 P30DC all 8 read from the document itself; NHTSA’s summary names none
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| V0122032066602_4 | Service bulletin | May 2, 2025 | 11018930 | |
| V0122032066602_3 | Service bulletin | Mar 10, 2025 | 11016579 | |
| V0122032066602_2 | Service bulletin | Jan 9, 2025 | 11013853 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 125 complaints with NHTSA since 2015. 42 of them name Electrical System, Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Incident Occurred in May. Was on Reddit and saw someone say to report any issues to NHTSA so that's what I'm doing At the end of the month in May (2023) when starting my car after work that had been sitting in the sun, it turned on but then turned off about 10 seconds later saying "ignition switch off safely stop the vehicle" then it…
2020 Volkswagen Jetta · Electrical System · filed with NHTSA Oct 4, 2023 · ODI 11548316
The car would not turn on while using the start/stop feature on three different occasions. Once at a stop sign when I wanted to reverse to make sure I was not pulled out too far into an intersection. I was stuck and could not get out of the way of a car coming. Each time I had to shut the vehicle off completely to restart the system
2021 Volkswagen Jetta · Electrical System · filed with NHTSA Feb 16, 2023 · ODI 11507553
The contact owns a 2021 Volkswagen Jetta. The contact stated that while reversing at an undisclosed speed, the vehicle lost motive power. The check engine warning light was illuminated. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure.
2021 Volkswagen Jetta · Engine · filed with NHTSA Feb 10, 2022 · ODI 11451329
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the engine
Source: same model, same component group54 other manufacturer communications filed against the Volkswagen Jetta under the same component group (engine), newest first. The eight newest are listed; the rest are on the Volkswagen list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 54E4 / 5537 | Service bulletin | Sep 30, 2026 | Update ECM Control Module Programming |
| V0116152014815_20 | Service bulletin | Sep 17, 2026 | Suggested fuel additive |
| V0126032083018_1 | Service bulletin | Aug 20, 2026 | Update Programming of the Engine/Motor Control Module -J623- |
| V1718062017813_24 | Service bulletin | Jul 9, 2026 | Oil Consumption Measurement and Electronic Oil Consumption Measurement |
| 4C6D | Service bulletin | Jun 24, 2026 | Engine/Motor Control Module software update for DTC 0456 |
| TT 13-20-01_3 | Service bulletin | Jun 18, 2026 | Instruction, how to lubicate engine before initial start. |
| TT 10-18-02_2 | Other | Jun 18, 2026 | Lubricating engine components before reassembly. |
| V1719012012855_81 | Service bulletin | Jun 4, 2026 | Volkswagen Engine Oil Standards |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Volkswagen, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Volkswagen 48A2 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 48A2 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Volkswagen warranty extension on file lists the ones Volkswagen has filed.
Which vehicles does 48A2 cover?
The manufacturer filed it against 2 model years: 2021 Volkswagen Jetta, 2020 Volkswagen Jetta. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.