# Service bulletin T\-TT\-0615\-20

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: 10177575
- Published by NHTSA: 2020\-07\-27
- Manufacturer's number: T\-TT\-0615\-20
- Manufacturer's date: 2020\-06\-01
- NHTSA component: ENGINE

## NHTSA's summary

TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation condition \(inconsistent acceleration\) and would like to recover detailed customer voice and vehicle data.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177575-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177575-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2018 to 2021 TOYOTA AVALON
- 2018 to 2021 TOYOTA CAMRY
- 2018 to 2021 TOYOTA HIGHLANDER
- 2018 to 2021 TOYOTA RAV4
- 2018 to 2020 TOYOTA SIENNA
- 2018 to 2021 TOYOTA TACOMA

## Recalls for the same vehicles and component

- [20V162000](/recalls/nhtsa/20V162000.md), 2020-03-19: ENGINE; FUEL SYSTEM, GASOLINE:DELIVERY
- [2020039](/recalls/tc/2020039.md), 2020-02-06: Engine
- [20V064000](/recalls/nhtsa/20V064000.md), 2020-02-06: ENGINE AND ENGINE COOLING
- [2018148](/recalls/tc/2018148.md), 2018-03-28: Engine
- [18V200000](/recalls/nhtsa/18V200000.md), 2018-03-28: ENGINE AND ENGINE COOLING:ENGINE

## Other bulletins for the same vehicles and component

- [T\-SB\-0110\-20 Rev2](/bulletins/11037202.md), 2026-09-09, Service bulletin: ENGINE. OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T\-SB\-0051\-26.
- [T\-SB\-0051\-26](/bulletins/11037201.md), 2026-09-09, Service bulletin: ENGINE. This bulletin includes basic procedures for performing a rescue charge at battery on high voltage \(HV\) Ni\-MH and Li\-ion batteries.
- [24TE04](/bulletins/11037186.md), 2026-09-09, Warranty extension: ENGINE. 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.
- [T\-SB\-0023\-26](/bulletins/11032467.md), 2026-05-08, Service bulletin: ENGINE. Some customers may experience a rough running engine with a MIL ON P140018 DTC. Upon further inspection, a loose C90/C27 connector pin at the EGR valve may be found. To correct this concern, please reference the repair section of this TSB.
- [T\-SB\-0104\-21 Rev2](/bulletins/11029896.md), 2026-03-07, Service bulletin: ENGINE. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
- [T\-SB\-0009\-26](/bulletins/11029893.md), 2026-03-07, Service bulletin: ENGINE. This bulletin includes basic procedures for performing a rescue charge on Ni\-MH high voltage \(HV\) batteries. This bulletin should be used in conjunction with the applicable model and model year Repair Manual while performing a rescue charge. The GRX\-5100 should be used wherever the Repair Manual references the Toyota Hybrid System \(THS\) charger.
- [T\-SB\-0119\-15 Rev2](/bulletins/11029892.md), 2026-03-07, Service bulletin: ENGINE. OBSOLETE NOTICE February 13, 2026: This bulletin is now obsolete. Please see T\-SB\-0009\-26.
- [T\-SB\-0089\-25](/bulletins/11027554.md), 2026-01-09, Service bulletin: ENGINE. Some 2021 – 2025 model year RAV4 Plug\-in Hybrid and RAV4 Prime 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.
- [24TE04](/bulletins/11022949.md), 2025-09-09, Service campaign: ENGINE. 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 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.
- [T\-SB\-0112\-24 Rev2](/bulletins/11020668.md), 2025-07-10, Service bulletin: ENGINE. Some 2018 – 2021 model year Toyota 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 \(Engine Coolant Bypass Valve Circuit Short to Battery or Open\).

JSON: [/v1/bulletins/10177575](/v1/bulletins/10177575)

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