Chrysler bulletin 18-027-26
What it saysFlash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. NHTSA’s full summary ↓
Chrysler filed this with NHTSA as a service bulletin dated Feb 26, 2026, received Mar 5, 2026, about the power train. It names 2 model years (2021). 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 communicationFlash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, SYMPTOM: a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ● **P152F - Engine Hood Switch 2 / Engine Hood Switch 1 Correlation.** ● U0418-00 - Implausible Data Received From Brake System Control Module 1. ● P061A - Level 2 Torque Performance. Customers may also experience one or more of the following: ● **Engine Stop/Start (ESS) is inoperable.** ● Battery depletes. ● Rough shifting while driving. ● Driveline bumps and rumbles when lightly applying the accelerator pedal in traffic or at other low vehicle speeds such as parking lot maneuvers. ● Transmission hard upshifts, rough/bump during low gear 1-2 and 2-3 at 40-64 kph (25-40 mph). This bulletin involves reprogramming the PCM with the latest available software.
Trouble codes it names: P152F
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 18-027-26 | Service bulletin | Feb 26, 2026 | 11029756 |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 18-19-06-KE | Module, Powertrain Control (PCM) - Reprogram | 0.3 hrs |
Read by machine from the document NHTSA serves (2 pages), read Sep 29, 2026. A part number is shown only where it matches Chrysler’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 2 model years this bulletin names have filed 414 complaints with NHTSA since 2015. 271 of them name Engine, 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.
On the 2021 Chrysler Pacifica, the 12 owners who gave an odometer reading for Engine reported it at a median of 24,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2021 Chrysler Voyager. The contact stated while driving approximately 30 MPH, the vehicle unintendedly accelerated while depressing the brake pedal. The contact stated that the electronic throttle control warning light was illuminated. The contact depressed the brake pedal and was able to slow the vehicle.
2021 Chrysler Voyager · Engine · filed with NHTSA Mar 31, 2025
I purchased a 2021 Chrysler Voyager in August 2024 from Apple Autos in Shakopee MN. When we purchased the car, there has always been a rough idle and were assured that this was due to the automatic start/engine. Around July 2025, I began experiencing engine issues that have persisted for over two months.
2021 Chrysler Voyager · Power Train · filed with NHTSA Sep 8, 2025
The contact owns a 2021 Chrysler Pacifica Hybrid. The contact stated while reversing into a parking space at approximately 2 MPH, the service transmission warning light illuminated, and the transmission shift knob was flashing. The contact stated that the vehicle had ceased to move.
2021 Chrysler Pacifica · Power Train · filed with NHTSA Feb 24, 2025
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 group21 other manufacturer communications filed against these Chrysler models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Chrysler list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 21-060-26 | Service bulletin | Sep 18, 2026 | Check Engine Light On and Transmission Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTO… |
| S2508000052 REV. B | Service bulletin | Jun 18, 2026 | Service Shifter Message on the Cluster and Shifter Unable to move Out of Park |
| 21-037-26 | Service bulletin | May 2, 2026 | Internal Transmission Wiring Connector Short And Motor A Bearing Failure Customers must experience a Malfunction Indicator Lamp (MIL) illumi… |
| 18-026-26 | Service bulletin | Feb 26, 2026 | Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle m… |
| 21-014-26 | Service bulletin | Feb 5, 2026 | Internal Transmission Wiring Connector Short And **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle… |
| 109997 | Service bulletin | Feb 3, 2026 | ACTUATOR - TRANSFER CASE |
| 18-095-25 | Service bulletin | Nov 12, 2025 | Flash: Powertrain Control Module (PCM) Updates *Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mu… |
| 18-094-25 | Service bulletin | Nov 12, 2025 | Flash: Powertrain Control Module (PCM) Updates *Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mu… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chrysler, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Chrysler 18-027-26 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 18-027-26 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 18-027-26 cover?
The manufacturer filed it against 2 model years: 2021 Chrysler Pacifica, 2021 Chrysler Voyager. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.