Subaru Forester check engine light flashing issue after replacing both O2 sensors on Subaru Forester

Some Subaru Forester owners report experiencing a flashing check engine light after replacing both O2 sensors, indicating a serious problem that requires immediate attention. This issue may be caused by misfires, which can foul the catalytic converter and trigger the warning light. Additionally, mechanical issues such as faulty wheel bearings or resealed axles can also lead to the check engine light activating. Problems with the ECU fuse may further contribute to the situation, potentially causing both the traction light and check engine light to illuminate. If the flashing check engine light persists, it is crucial for owners to have their vehicle inspected by certified technicians to diagnose and resolve the underlying issues promptly, as neglecting this warning can result in more severe problems and costly repairs.