Lexus CT200h coolant consumption issue possibly related to head gasket failure on Lexus CT200h

Some Lexus CT200h owners report experiencing coolant consumption issues that may be related to head gasket failure. Symptoms of this problem include misfiring that worsens from cold starts, coolant consumption without visible leaks, coolant contamination in the oil, and the illumination of the check engine light. The head gasket, made of steel, can develop cracks or warping due to the frequent starting and stopping of the engine, leading to coolant leaking into the combustion cylinders. Additionally, burning coolant can contribute to quicker clogging of the EGR system. While head gasket issues are more prevalent in the US compared to the UK, they remain a concern for owners. Before pursuing other repairs, it is advisable to replace components such as the intake, EGR, injector cleaner, and spark plugs, while closely monitoring coolant levels for any significant decrease. Cleaning or replacing EGR-related components can also help prevent blown head gaskets due to blockages. Therefore, if coolant consumption is an issue, it is recommended to have the vehicle inspected by a qualified mechanic to assess for potential head gasket failure.