Lincoln MKZ overheating issue when going uphill with no check engine light at 63k miles on Lincoln MKZ

Some Lincoln MKZ owners report experiencing overheating issues while going uphill, even when the check engine light does not illuminate. These overheating problems may stem from factors such as coolant leaks, faulty radiator fans, or failed thermostats, which can disrupt proper coolant flow and lead to engine overheating. Owners have noted symptoms like smoke from under the hood, a pegged temperature gauge, or signs of a blown head gasket. Ignoring these overheating signs can result in serious engine damage, making it essential to address the issue promptly. Additionally, some owners find that the absence of a check engine light during overheating could indicate a malfunction with the light itself, the engine control module (ECM), or an issue not yet recognized as serious by the ECM. It is recommended that affected owners have their Lincoln MKZ inspected by a qualified mechanic to diagnose and resolve the overheating issue to prevent further engine damage.