PACCAR service campaign E324
What it says"Campaign New and improved software is now required for chassis equipped with an Engine Model Year 2016 PACCAR MX-13 engine to maintain DEF sensor performance and ensure compliance with emissions standards. NHTSA’s full summary ↓
PACCAR filed this with NHTSA as a service campaign dated Jul 16, 2026, received Sep 3, 2025, about the electrical system — 2 documents under this number. It names 9 model years across Kenworth, Peterbilt and Paccar (2016–2018). A service campaign 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.
One page for every brand it was filed under. Each brand’s bulletins: Kenworth · Peterbilt · Paccar.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
"Campaign New and improved software is now required for chassis equipped with an Engine Model Year 2016 PACCAR MX-13 engine to maintain DEF sensor performance and ensure compliance with emissions standards.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| E324 | Service bulletin | Jul 16, 2026 | 11035148 | PDF, 622 KB |
| E324 | Service campaign | Aug 4, 2025 | 11022487 | PDF, 352 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 themKenworth 2 model years
Also filed against: 2016 Kenworth T680; 2018 Kenworth T680.
Peterbilt 6 model years
Also filed against: 2016 Peterbilt 367; 2018 Peterbilt 367; 2016 Peterbilt 567; 2018 Peterbilt 567; 2016 Peterbilt 579; 2018 Peterbilt 579.
Paccar 1 model year
Also filed against: 2018 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.
More bulletins about the electrical system
Source: same model, same component group12 other manufacturer communications filed against these PACCAR models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Kenworth list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| E328 | Service campaign | Oct 16, 2026 | Certain chassis with CARB 2024 compliant MX-13 engines must have the PEU wiring harnesses updated. The original wiring and fuse are insuff… |
| 26PACD | Service campaign | Sep 19, 2026 | "The PKC Group power distribution center (PDC) in certain vehicles may be contaminated with oil, which could result in a loss of power to th… |
| 24PBE/KWE | Warranty extension | Feb 11, 2026 | The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between… |
| 24KWE / 24PBE | Emissions | Jan 31, 2026 | The parts section has been updated for clarity. The right-hand shift stalk may have an improper wire harness terminal crimp within the wire… |
| 24PBE_24KWE | Warranty extension | Jan 13, 2026 | 24PBE_24KWE RH Shift Stalk Update Warranty section has been updated with revised verbiage for picture requirements. |
| 24PBE | Service campaign | Nov 26, 2025 | The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between… |
| 24KWE | Service campaign | Nov 26, 2025 | The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between… |
| 98-030 | Service campaign | May 31, 2025 | 5/29/2025: A new Ethernet Multiplexed Architecture (EMUX) Service Tool Kit service manual (SM034-022) has been released to provide general u… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kenworth, Peterbilt and Paccar, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is PACCAR E324 a recall?
No. A service campaign 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 E324 repair free?
A service campaign 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 E324 cover?
The manufacturer filed it against 9 model years across 3 brands (Kenworth, Peterbilt and Paccar): 2016 Kenworth T680, 2018 Kenworth T680, 2018 Paccar MX-13, 2016 Peterbilt 367, 2018 Peterbilt 367, 2016 Peterbilt 567 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 24 Jan 2017 – 3 Feb 2017 — the build date is on the certification label in the driver’s door jamb.