TSB: Some 2016 ? 2023 model year Toyota vehicles may exhibit a hybrid system warning lamp occurring in below-freezing temperatures (below 32°F or 0°C). After performing a Health Check, one or both of the following Diagnostic Trouble Codes (DTCs) may be present:
?P1C8449 ? (High Voltage Power Resource Circuit Short during Ready ON)
?P300449 ? (High Voltage Power Resource Circuit Short during Pre-Charge)
Follow the Repair Procedure in this bulletin to address this condition.
