Paccar bulletin E273
Paccar filed this with NHTSA as a emissions communication dated Aug 22, 2025, received May 5, 2023, about the engine and engine cooling — 3 documents under this number. It names 9 model years (2016–2021). A emissions communication is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationFix As Fail Part number 2200138 DPF Pressure Sensor has been added to the parts table for the following PACCAR MX engines: •EMY2021 MX13-1 •EMY2022 MX13 •EMY2020 MX13-2 •EMY2021B MX13-1 Part number 2236409 NOx Sensor before catalyst been added to the parts table for PACCAR MX13-1 EMY2020 Per Environment and Climate Change Canada (ECCC) regulations and guidance (Canadian Environmental Protection Act, 1999 (CEPA)), a letter has been provided to owners of Canadian registered chassis that provides a list of emissions components that have been reported (to ECCC) as having a defect.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| E273 | Emissions | Aug 22, 2025 | 11022489 | not yet checked |
| E273 | Service bulletin | Sep 20, 2024 | 11008567 | not yet checked |
| E273 | Service bulletin | Apr 6, 2023 | 10235719 | not yet checked |
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 themAlso filed against: 2016 Paccar MX-11; 2017 Paccar MX-11; 2018 Paccar MX-11; 2021 Paccar MX-11; 2016 Paccar MX-13; 2017 Paccar MX-13; 2018 Paccar MX-13; 2020 Paccar MX-13; 2021 Paccar MX-13.
None of these model years has a page on this site (it covers EPA-certified cars, trucks and SUVs from 2016), so the bulletin is listed here on its own.
Common questions
Source: NHTSA, 49 CFR 579.5Is Paccar E273 a recall?
No. A emissions communication 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.
Is the E273 repair free?
A emissions communication is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does E273 cover?
The manufacturer filed it against 9 model years: 2016 Paccar MX-11, 2017 Paccar MX-11, 2018 Paccar MX-11, 2021 Paccar MX-11, 2016 Paccar MX-13, 2017 Paccar MX-13 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.