Some Honda Passport owners report experiencing starting problems characterized by intermittent cranking and no ignition. These issues are often attributed to a weak or dead 12v battery, which can lead to slow cranking or complete failure to crank, resulting in clicking sounds without engine engagement. Additionally, some owners find that corroded or damaged battery posts contribute to these starting difficulties, as corrosion on battery terminals can prevent proper electrical flow. Problems with the starter system, such as a faulty starter motor, have also been reported, with symptoms including prolonged cranking or unusual engine revving before stabilizing. It is essential for owners to diagnose the specific cause of these issues to determine the necessary repairs, which may involve replacing the alternator, starter, or battery, cleaning connections, or addressing ignition and fuel system problems. Seeking professional diagnosis and repair is recommended for effective resolution of these starting concerns.

Some Honda Passport owners report experiencing coolant leaks from a small hose under the intake manifold, often due to loose hose connections, a broken radiator, or a failed water pump. These leaks can also be attributed to gasket issues or problems with the manifold itself, necessitating a visual inspection and possibly the use of a pressure tester. Additionally, owners are advised to check for coolant lines beneath the intake manifold, as leaks may occur from the rubber O ring or coolant hoses connected to the side of the block. Some experience intermittent leaks from pipes and hoses under the intake manifold, which can lead to coolant contamination in the engine oil or spark plugs. Furthermore, leaks in the throttle body coolant hoses may leave a blue-green residue, indicating the presence of a leak. To effectively address these issues, it is crucial for owners to conduct thorough inspections and consider replacing affected hoses, gaskets, or the manifold as needed.