# Service bulletin 37844.1.0

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11035001
- Published by NHTSA: 2026\-07\-14
- Manufacturer's number: 37844.1.0
- Manufacturer's date: 2026\-06\-26
- NHTSA component: ENGINE

## NHTSA's summary

This is a TJ \- text, plus 1 attached PDF \- and 2 .MOV files If a noise from the engine occurrs during idling, refer to the attached sound file for reference and comparison; see attachment TJ\_37844\_1.MOV. If the noise corresponds to the attached sound file, make sure that the fresh air hose is not squeezed or kinked; see attachment TJ\_37844\_2.MOV. For location and correct clip positions, see attachment TJ\_37844\_1.pdf. Note that this noise is similar to the chirping noise from the camshaft seal described in TJ 36551.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035001-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035001-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2027 VOLVO XC60PHEV
- 2027 VOLVO XC90PHEV

## Other bulletins for the same vehicles and component

- [37083.8.1](/bulletins/11037971.md), 2026-10-05, Service bulletin: ENGINE. This is a Technical Journal: Text plus 1 MP4 \- Not possible to go to Drive mode after ERS start. Download software. Please follow the advice under "Service".
- [37844.2.0](/bulletins/11037961.md), 2026-10-05, Service bulletin: ENGINE. This is a TJ \- text, plus 1 attached PDF \- and 2 .MOV files If a noise from the engine occurrs during idling, refer to the attached sound file for reference and comparison; see attachment TJ\_37844\_1.MOV. If the noise corresponds to the attached sound file, make sure that the fresh air hose is not squeezed or kinked; see attachment TJ\_37844\_2.MOV. For location and correct clip positions, see attachment TJ\_37844\_1.pdf. Note that this noise is similar to the chirping noise from the camshaft seal described in TJ 36551.

JSON: [/v1/bulletins/11035001](/v1/bulletins/11035001)

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