Here is what the bulletin explains:
Vibration/Tapping and/or Misfire After Cold Soak
Service
Category Engine/Hybrid System
Engine Control
Market USA
Section
Applicability
Introduction
Some 2013 †2016 model year CT 200h vehicles may exhibit a vibration due to a rough idle and/or tapping noise from the HV transaxle after cold soak. The check engine light may also illuminate with Diagnostic Trouble Codes (DTCs) P0300, P0301, P0302, P0303, or P0304 (Random/Multiple Cylinder Misfire Detected). The Engine Control Module/ECM (SAE Term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring.
This would be the only other solution left to have completed and that is to have the Engine Control Module reflashed with the latest calibration if it is not current.
Monday, April 4th, 2022 AT 11:05 AM