Volvo bulletin 37929.2.0
What it saysThis is a TJ - text only no attachments - If a customer experiences a DIM message stating "Propulsion System Service Required" and DTC IGM P06B400 is set, please follow the advice under "Service". NHTSA’s full summary ↓
Volvo filed this with NHTSA as a service bulletin dated Sep 14, 2026, received Oct 5, 2026. It names 2 model years (2027). 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.
Get the next Volvo bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis is a TJ - text only no attachments - If a customer experiences a DIM message stating "Propulsion System Service Required" and DTC IGM P06B400 is set, please follow the advice under "Service". Verify that the vehicle has software version 5.1.21 or newer. If necessary, update the vehicle's software according to TJ 31543. If the vehicle already has software version 5.1.21 or newer, or if the DTC comes back after the software update, replace the IGM.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 37929.2.0 | Service bulletin | Sep 14, 2026 | 11037964 |
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.
Email me new Volvo bulletins for one of these models
A weekly email, sent only in a week when Volvo files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Volvo, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Volvo 37929.2.0 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 37929.2.0 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.
Which vehicles does 37929.2.0 cover?
The manufacturer filed it against 2 model years: 2027 Volvo XC60, 2027 Volvo XC90. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.