Mitsubishi bulletin TSB-23-13-004
What it saysThis Technical Service Bulletin provides instructions to reprogram the ECU with the countermeasure software when the check engine light illuminates with DTC of P0401/ P0400. NHTSA’s full summary ↓
Mitsubishi filed this with NHTSA as a service bulletin dated Aug 2, 2023, received Sep 6, 2023, about the engine. It names 5 model years (2019–2023). 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 communicationThis Technical Service Bulletin provides instructions to reprogram the ECU with the countermeasure software when the check engine light illuminates with DTC of P0401/ P0400.
Trouble codes it names: P0400 P0401
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TSB-23-13-004 | Service bulletin | Aug 2, 2023 | 10241921 | PDF, 582 KB |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| MB991910 | — | — | |
| 1860D225 | Same as New | — | eBay Motors → |
| 1860D309 | Same as New | — | eBay Motors → |
| 1862D226 | Same as New | — | eBay Motors → |
| 1860D472 | Same as New | — | eBay Motors → |
| 1862D227 | Same as New | — | eBay Motors → |
| 1860D744 | Same as New | — | eBay Motors → |
| 1862D228 | Same as New | — | eBay Motors → |
| 1860D779 | Same as New | — | eBay Motors → |
| 1862D229 | — | — | |
| 1860D859 | — | — | |
| MB991824 | — | — |
Read by machine from the document NHTSA serves (9 pages), read Sep 30, 2026. A part number is shown only where it matches Mitsubishi’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 5 model years this bulletin names have filed 415 complaints with NHTSA since 2015. 32 of them name Engine — 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.
Entire engine and electrical system failure not corrected with new battery or $30,000 mi. service. Once I turn car off, everything freezes up and won’t start again. Windows, steering, starter, everything locks up. Had to tow it to service 2 times in 3 weeks and they claim they can’t find problem. Dangerous!
2022 Mitsubishi Outlander · Engine · filed with NHTSA Apr 11, 2024
The contact owns a 2023 Mitsubishi Outlander PHEV. The contact stated while driving at various speeds, the vehicle lost automotive power. The check engine warning light was illuminated. The vehicle was taken to a local dealer; however, the vehicle was not diagnosed. The vehicle was not repaired.
2023 Mitsubishi Outlander · Engine · filed with NHTSA Apr 30, 2025
The contact owned a 2019 Mitsubishi Outlander. The contact stated that while the vehicle was parked and turned off, a fire occurred near the engine compartment. The fire was extinguished by the fire department. A fire report was filed, and a fire report number was provided.
2019 Mitsubishi Outlander · Engine · filed with NHTSA Sep 26, 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 engine
Source: same model, same component group14 other manufacturer communications filed against the Mitsubishi Outlander under the same component group (engine), newest first. The eight newest are listed; the rest are on the Mitsubishi list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SC-26-003 | Service campaign | Aug 19, 2026 | This Service Campaign Bulletin sent to dealers provides instructions to reflash the ECU to address fault codes P0128-00, P2096-00 and P050A. |
| SC-26-002 | Service campaign | Jul 31, 2026 | This Service Campaign Bulletin sent to dealers provides instructions to reflash the ECU to address fault codes P0128-00, P2096-00 and P050A. |
| SC-26-001 | Service campaign | Jul 7, 2026 | This Service Campaign Bulletin sent to dealers provides instructions to reflash the ECU to address fault code P0128-00, and effective 6/26/2… |
| TSB-26-14-001 | Service bulletin | Jun 25, 2026 | This revised Technical Service Bulletin sent to dealers provides instructions to reflash the Engine Control Unit with updated software when… |
| WB2026-007 | Service bulletin | Mar 20, 2026 | This Warranty Bulletin provides instructions on submiting a warranty claim when the check engine light is on with either P2096-00 or P0128-0… |
| TIN-25-11-002 | Service bulletin | Dec 16, 2025 | This Technical Information Notice informs dealers to check for assembly lubricant seepage between the engine and transmission, and if found… |
| TSB-22-13-001REV | Service bulletin | Jan 28, 2025 | This Revised Technical Service Bulletin provides instructions to reprogram the Engine Control Module (ECU) with countermeasure software for… |
| TSB-24-16-001 | Service bulletin | May 8, 2024 | This Technical Service Bulletin provides instruction to reprogram the ECU to address an engine warning light and engine power reduction duri… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Mitsubishi, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mitsubishi TSB-23-13-004 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 TSB-23-13-004 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 TSB-23-13-004 cover?
The manufacturer filed it against 5 model years: 2023 Mitsubishi Outlander, 2022 Mitsubishi Outlander, 2021 Mitsubishi Outlander, 2020 Mitsubishi Outlander, 2019 Mitsubishi Outlander. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.