Infiniti bulletin ITB23-020
What it saysMIL on with DTC P050B stored in the ECM if YOU confirm the MIL is on and DTC P050B cold start control is stored in the ECM. NHTSA’s full summary ↓
Infiniti filed this with NHTSA as a service bulletin dated Jun 16, 2023, received Jun 29, 2023, about the engine. It names 1 model year (2022). 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 communicationMIL ON WITH DTC P050B STORED IN THE ECM IF YOU CONFIRM The MIL is ON and DTC P050B COLD START CONTROL is stored in the ECM. ACTION Follow the SERVICE PROCEDURE in this bulletin to reprogram the ECM, if applicable.
Trouble codes it names: P050B
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| ITB23-020 | Service bulletin | Jun 16, 2023 | 10238333 | PDF, 106 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the engine control module (ecu/ecm) for the 2022 QX60 →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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 1 model year this bulletin names have filed 23 complaints with NHTSA since 2015. 3 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.
Our 2022 Infiniti QX60 was brought in at Infiniti Service Center for regular oil change. The car had 29,564 miles. After the service, I was deciding whether to take the highway or the local route. I thought of stopping by the church, so I decided to take the local route.
2022 Infiniti QX60 · Engine · filed with NHTSA Aug 6, 2025 · ODI 11678863
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 group4 other manufacturer communications filed against the Infiniti QX60 under the same component group (engine), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ITB25-002 | Service bulletin | Feb 25, 2025 | DRIVABILITY CONCERNS AT HIGHWAY SPEEDS AND ON INCLINES IF YOU CONFIRM A lugging / shutter / judder at highway speeds, especially on slight i… |
| ITB24-001A | Service bulletin | Mar 22, 2024 | ENGINE SUPPORT TOOLS This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bu… |
| ITB24-001 | Service bulletin | Feb 23, 2024 | ENGINE SUPPORT TOOLS SERVICE INFORMATION A new Engine Support Tool, Engine Support Bracket, and CVT Transmission Jack Adapter are now a… |
| ITB23-026 | Service bulletin | Nov 6, 2023 | MIL IS ON WITH DTC P0300 STORED IN THE ECM IF YOU CONFIRM The MIL is ON with DTC P0300 for “MULTI CYL MISFIRE” stored in the ECM. ACTIO… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Infiniti, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Infiniti ITB23-020 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 ITB23-020 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 ITB23-020 cover?
The manufacturer filed it against 1 model year: 2022 Infiniti QX60. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.