Toyota Technical Service Bulletin

Introduction

This bulletin addresses a potential issue in certain 2018-2019 Toyota C-HR models (equipped with a 3ZR-FAE engine) and 2020 Toyota Corolla models (equipped with a 2ZR-FAE engine). These vehicles may display a Malfunction Indicator Lamp (MIL) illuminated due to specific Diagnostic Trouble Codes (DTCs): P2646, P265B, P10A0, or P1055. These codes are related to the Variable Valve Lift system.

The bulletin provides a detailed repair procedure to diagnose and resolve this condition, including necessary parts, tools, and warranty information.

Applicability

• 2018 – 2019 Toyota C-HR
• 2020 Toyota Corolla

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])

Repair Procedure Overview

The repair procedure involves using the Techstream diagnostic tool to verify the DTCs, clear them, and perform a Learn Value Reset for the Variable Valve Lift system. It may also require the replacement of the continuously variable valve lift controller assembly. The steps include specific instructions for testing the VALVEMATIC system and confirming the repair.

Warranty Information

This repair may be covered under the Toyota Powertrain Warranty (60 months/60,000 miles) or the California Long-Term Emission Warranty (84 months/70,000 miles) for applicable vehicles and states.