Service bulletin L-TT-0336-24
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11010366 |
| Published by NHTSA | 2024-11-08 |
| Manufacturer's number | L-TT-0336-24 |
| Manufacturer's date | 2024-10-24 |
| Campaign id or software version | L-TT-0336-24 |
| NHTSA component | ENGINE |
NHTSA's summary
After jump-starting, the vehicle may experience a no-start condition and multiple DTCs including U010087 - Lost Communication with ECM/PCM "A" Missing Message. Upon investigation, it is found that the engine ECU has been damage and needs to be replaced. In several cases, the cause of the ECU damage was improper jump starting. Further investigation found that ECU damage may occur if the negative (ground) cable clamps are attached on or around the engine ECU or mounting bracket.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine
Trouble codes named
U0100
| LEXUS ES | 2019, 2020, 2021, 2022, 2023, 2024 |
|---|---|
| LEXUS ES HYBRID | 2019 to 2024 |
| LEXUS NX | 2022, 2023, 2024 |
| LEXUS NX HYBRID | 2022 to 2024 |
| LEXUS RX HYBRID | 2023 to 2024 |
| LEXUS TX | 2024 |
| LEXUS TX HYBRID | 2024 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| L-SB-0021-25 | 2026-04-08. Service bulletin. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete. |
|---|---|
| L-SB-0021-25 | 2026-03-07. Service bulletin. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete. |
| L-SB-0052-25 | 2025-12-05. Service bulletin. Some 2022 – 2025 model year NX 450h+ and 2024 – 2025 RX 450h+ vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P019064 (Fuel Rail Pressure Sensor “A” Signal Plausibility Failure) present. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to address this condition. |
| 24LE02 | 2025-09-09. Service campaign. The specific condition covered by this program is for a small engine coolant leak that can occur from the flow shut-off valve that can allow coolant to drip on other parts of the vehicle. This can cause "Engine Maintenance Required" to be displayed on the instrument cluster or cause the A/C not to function normally. Although the flow shut-off valve is covered by Lexus’ New Vehicle Limited Warranty for 48 months or 50,000 miles (whichever comes first), we at Lexus care about the guests’ ownership experience. Lexus is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak |
| L-SB-0051-24 Rev2 | 2025-07-10. Service bulletin. Some 2021 model year ES 250 and 2019 – 2021 model year ES 300h and UX 200 vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Engine Maintenance Required” message is displayed in the Multi-Information Display (MID). Additionally, the vehicle will exhibit DTC(s) P268111 (Engine Coolant Bypass Valve Circuit Short to Ground) and/or P268115 (Engine Coolant Bypass Valve Circuit Short to Battery or Open). |
| 25LC01 | 2025-06-06. Service bulletin. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 25LC01 LOW-PRESSURE FUEL PUMP CERTAIN 2019 ES 300h VEHICLES |
| 25LC01 | 2025-06-06. Service campaign. SPECIAL SERVICE CAMPAIGN 25LC01 Certain 2019 Model Year ES 300h Vehicles Low-Pressure Fuel Pump Frequently Asked Questions |
| 25LC01 | 2025-06-06. Service campaign. The subject vehicles are equipped with a low-pressure fuel pump which may stop operating. If this were to occur, warning lights and messages may be displayed on the instrument panel, and the engine may run rough. This will lead to the vehicle entering a failsafe driving mode in which the vehicle can still be driven for certain distances. |
| 25LC01 | 2025-06-06. Service bulletin. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 25LC01 LOW-PRESSURE FUEL PUMP CERTAIN 2019 ES 300h VEHICLES |
| 25LC01 | 2025-06-06. Service campaign. Certain 2019 Model Year ES 300h Vehicles Low-Pressure Fuel Pump Frequently Asked Questions |