Service bulletin T-TT-0784-25 Rev1
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 | 11020664 |
| Published by NHTSA | 2025-07-10 |
| Manufacturer's number | T-TT-0784-25 Rev1 |
| Manufacturer's date | 2025-06-17 |
| Campaign id or software version | T-TT-0784-25 Rev1 |
| NHTSA component | ENGINE |
NHTSA's summary
Some ECUs can set a DTC that is common with other ECUs. This can lead to accidental use of the wrong repair manual when diagnosing these type of DTCs.
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
| TOYOTA AVALON HYBRID | 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| TOYOTA BZ4X | 2023, 2024, 2025 |
| TOYOTA CAMRY HYBRID | 2019, 2020, 2021, 2022, 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it) |
| TOYOTA COROLLA CROSS HYBRID | 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it) |
| TOYOTA COROLLA HYBRID | 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it) |
| TOYOTA PRIUS | 2019, 2020, 2021, 2022, 2023, 2024, 2025 |
| TOYOTA PRIUS PRIME | 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| TOYOTA RAV4 HYBRID | 2020, 2021, 2022, 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it) |
| TOYOTA RAV4 PRIME | 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| TOYOTA VENZA HYBRID | 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 21V734000 | 2021-09-22. HYBRID PROPULSION SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE |
|---|---|
| 2020039 | 2020-02-06. Engine |
| 20V064000 | 2020-02-06. ENGINE AND ENGINE COOLING |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| T-SB-0034-26 Rev1 | 2026-10-08. Service bulletin. Some 2025 – 2026 model year Camry HV vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P0A1B94 (Drive Motor A Control Module Unexpected Operation) stored. The logic in the Motor Generator Control ECU has been modified to address this condition. |
|---|---|
| T-SB-0110-20 Rev2 | 2026-09-09. Service bulletin. OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T-SB-0051-26. |
| T-SB-0051-26 | 2026-09-09. Service bulletin. This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries. |
| 26TC03 | 2026-09-09. Service campaign. TECHNICAL INSTRUCTIONS FOR EMISSION NONCOMPLIANCE RECALL 26TC03 Certain 2022 – 2025 Model Year RAV4 Incorrect Mass Air Flow Sensor Reading |
| 26TC03 | 2026-09-09. Service campaign. In wet conditions, water contacting the radiator in the subject vehicles after idling for an extended period can create steam that can cause an incorrect engine sensor reading. This can lead to a warning light, a rough-running engine, or a potential engine stall while idling or operating at low speeds. |
| 24TE04 | 2026-09-09. Warranty extension. Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak. |
| 26TC03 | 2026-08-12. Service bulletin. TECHNICAL INSTRUCTIONS FOR EMISSION NONCOMPLIANCE RECALL 26TC03 Certain 2022 – 2025 Model Year RAV4 Incorrect Mass Air Flow Sensor Reading |
| 26TC03 | 2026-08-12. Service bulletin. TECHNICAL INSTRUCTIONS FOR EMISSION NONCOMPLIANCE RECALL 26TC03 Certain 2022 – 2025 Model Year RAV4 Incorrect Mass Air Flow Sensor Reading |
| 26TC03 | 2026-08-12. Service campaign. In wet conditions, water contacting the radiator in the subject vehicles after idling for an extended period can create steam that can cause an incorrect engine sensor reading. This can lead to a warning light, a rough-running engine, or a potential engine stall while idling or operating at low speeds. |
| T-SB-0034-26 | 2026-07-08. Service bulletin. Some 2025 — 2026 model year Camry HV vehicles may exhibit a MIL on condition with DTC P0A1B94(Drive Motor "A" Control Module Unexpected Operation) stored. The logic in the MG ECU has been modified to address this condition. |