Ram bulletin 1802423
What it saysFlash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. NHTSA’s full summary ↓
Ram filed this with NHTSA as a service bulletin dated May 24, 2023, received Jul 31, 2023, 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 the technician may find that one or more of the following Diagnostic Trouble Codes (DTC)s have been set: ? **P0299 - Turbocharger Underboost.** ? P061B - Internal Control Module Torque Calculation Performance. ? P0755 - Shift Solenoid B (DG7 Only). ? P0765 - Shift Solenoid D (DG7 Only). ? P0401 - EGR System Performance. ? P0755 - 2C Solenoid Circuit. ? P0765 - UD Solenoid Circuit. ? P244A - Diesel Particulate Filter Differential Pressure Too Low. ? P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. ? P242F - Diesel Particulate Filter Restriction - Ash Accumulation. ? P1451 - Diesel Particulate Filter System Performance. ? P2463 - Diesel Particulate Filter Restriction - Soot Accumulation Bank 1. ? P0607-00 - ECU Internal Performance. ? P0299-00 - Turbocharger Underboost. ? P1451-00 - Diesel Particulate Filter System Performance (Sales Code ETL Only).
Trouble codes it names: P0299 P061B P0755
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 1802423 | Service bulletin | May 24, 2023 | 10239971 | not found |
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 170 complaints with NHTSA since 2015. 88 of them name Electrical System, 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.
Driving highway speed and truck shut off completely. Took to dealer, no issues found. 800 miles later driving highway speed truck shut off again. Took to dealer, no issues found so far. Complete loss of power, power steering, power brakes, etc. Display read, "Press brake and push button to start" while coasting in neutral both times
2021 Ram 2500 · Electrical System · filed with NHTSA Dec 2, 2021
The contact owns a 2021 Ram 2500. The contact received notification of NHTSA Campaign Number: 22V835000 (Power Train) however, the part to do the recall repair was not yet available. The contact notified the local dealer of the issue and was informed that the dealer only received one part per week to perform the recall repair.
2021 Ram 2500 · Power Train · filed with NHTSA Jan 6, 2023
The contact owns a 2021 Ram 3500. The contact received notification of NHTSA Campaign Number: 22V835000 (Power Train) and 23V060000 (Electrical System) however, the parts to do the recall repairs were unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs.
2021 Ram 3500 · Power Train · filed with NHTSA May 2, 2023
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 group65 other manufacturer communications filed against these Ram models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Ram list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 114739 | Service bulletin | Sep 24, 2026 | TRANSMISSION KIT - WITH TORQUE CONVERTER |
| 08-302-26 | Service bulletin | Aug 1, 2026 | Flash: Electronic Shift Module (ESM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must… |
| 18-067-26 | Service bulletin | Jul 14, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mus… |
| 18-066-26 | Service bulletin | Jul 8, 2026 | Seed Request Denied During Technicians may experience the following: SYMPTOM: ● The scan tool displays the message "Seed Request denied" whe… |
| 9100841 | Service bulletin | Jun 25, 2026 | HD Front and Rear Prop Shafts Increase U-Joint Usage If customer concern diagnosis leads to suspect u-joint issue or failure with the prop s… |
| 18-002-26 REV. B | Service bulletin | Jun 24, 2026 | Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may… |
| 21-039-26 | Service bulletin | May 8, 2026 | Replace K1 Clutch / Input Shaft Assembly Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhi… |
| 21-029-26 REV. A | Service bulletin | May 1, 2026 | Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle m… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Ram, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ram 1802423 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 1802423 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 1802423 cover?
The manufacturer filed it against 2 model years: 2021 Ram 2500, 2021 Ram 3500. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.