This is taken from TSB T-SB-0098-19
1. Using Techstream, check for stored DTCs. Are DTCs P2646, P265B, P10A0, or P1055 present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Clear ALL DTCs, start the...
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...