Jaguar bulletin H444
What it saysWhen connected to a diagnostic scan tool during the California SMOG test, the Powertrain Control Module (PCM) incorrectly reports the monitor readiness status as 'not supported'. NHTSA’s full summary ↓
Jaguar filed this with NHTSA as a service bulletin dated Jul 18, 2023, received Aug 2, 2023, about the power train. It names 3 model years (2019). 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 communicationWhen connected to a diagnostic scan tool during the California SMOG test, the Powertrain Control Module (PCM) incorrectly reports the monitor readiness status as 'not supported'.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| H444 | Service bulletin | Jul 18, 2023 | 10240224 | PDF, 210 KB |
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 3 model years this bulletin names have filed 25 complaints with NHTSA since 2015. 1 of them name Power Train — 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.
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 power train
Source: same model, same component group28 other manufacturer communications filed against these Jaguar models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Jaguar list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM76455 - 12MAY26 | Other | May 12, 2026 | Malfunction Indicator Lamp (MIL) is illuminated on the instrument panel. |
| JLRTB02023NAS3 RESCINDED | Service bulletin | Oct 14, 2025 | MIL Illuminated. |
| TUCC_JUN2025_46 | Other | Jun 13, 2025 | MIL on Instrument cluster. |
| TUCC_JUN2025_28 | Other | Jun 13, 2025 | TURBOCHARGER COOLANT FEED AND RETURN PIPE O- RING LEAK |
| TUCC_MAY2025_34 | Other | May 9, 2025 | Vehicle cranks, but does not run when at operating temperature |
| TUCC_APR2025_44 | Other | Apr 11, 2025 | Electrical system warning light will be on the instrument cluster. |
| Jaguar_H422_17JAN25 | Other | Jan 17, 2025 | Malfunction Indicator Lamp (MIL) may illuminate |
| Jaguar_H422_20DEC24 | Other | Dec 20, 2024 | Malfunction Indicator Lamp (MIL) may illuminate |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Jaguar, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Jaguar H444 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 H444 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 H444 cover?
The manufacturer filed it against 3 model years: 2019 Jaguar F-Pace, 2019 Jaguar XE, 2019 Jaguar XF. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.