Service bulletin T-SB-0098-19

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10164873
Published by NHTSA	2019-09-16
Manufacturer's number	T-SB-0098-19
Manufacturer's date	2019-08-05
NHTSA component	ENGINE AND ENGINE COOLING

NHTSA's summary

TSB: Some 2018 - 2019 model year C-HR (equipped with a 3ZR-FAE engine) and 2020 model year Corolla (equipped with a 2ZR-FAE engine) vehicles may exhibit a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs): * P2646 (A Rocker Arm Actuator System Performance or Stuck Off [Bank 1]) * P265B (B Rocker Arm Actuator Position Sensor Circuit Range Performance [Bank 1]) * P10A0 (Valvematic Angle Difference [CSS]) * P1055 (Valvematic Angle Difference [ECU]) Follow the Repair Procedure in this bulletin to address this condition.

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

P1055, P10A0, P2646, P265B

Vehicles listed
TOYOTA C-HR	2018, 2019
TOYOTA COROLLA HATCHBACK	2020 (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.

Other bulletins for the same vehicles and component
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.
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.
26TE06	2026-08-12. Service campaign. Although the Continuously Variable Transmissions (CVT) is covered by Toyota’s New Vehicle Limited Warranty for 5 years or 60,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to an abnormal whine noise in the CVT.
T-SB-0104-21 Rev2	2026-03-07. Service bulletin. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
22TC07	2025-12-05. Other. Owner Renotification Letter Due to certain programing in the engine ECU, under certain conditions, the vehicle may stall at low speeds when accelerating from a stop. If this low-speed vehicle stall occurs, steering and braking are not impacted, and the vehicle can be restarted immediately.
22TC07	2025-12-05. Other. Owner Renotification Letter Due to certain programing in the engine ECU, under certain conditions, the vehicle may stall at low speeds when accelerating from a stop. If this low-speed vehicle stall occurs, steering and braking are not impacted, and the vehicle can be restarted immediately.
T-SB-0088-23 Rev2	2025-09-09. Service bulletin. OBSOLETE NOTICE August 19, 2025: This bulletin is now obsolete. Please see T-SB-0059-25.
T-SB-0059-25	2025-09-09. Service bulletin. Some 2020 – 2025 model year Corolla vehicles may exhibit a vibration or rattle noise from the right-hand engine mounting insulator sub-assembly. This condition will usually go away when the engine’s Revolutions Per Minute (RPM) are above idle. This condition is typically found on vehicles in warm climates/weather. No Diagnostic Trouble Codes (DTCs) are associated with this condition. This condition does not affect the operation of the vehicle.
24TE04	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 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	2025-07-10. Service bulletin. 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).