Dodge Caravan startup screech noise in cold weather lasts 1-2 seconds on Dodge Caravan

Some Dodge Caravan owners report experiencing a screeching noise lasting 1-2 seconds during startup in cold weather, which may be linked to engine issues in low temperatures. Chrysler has noted that this high-frequency screech can occur within 20 seconds of startup and last intermittently for about 90 seconds, particularly at temperatures around freezing. This problem can often be resolved by replacing the idler pulley with an updated part. Additionally, some owners find that toggling the air conditioning or operating the headlight switch helps diagnose the source of the noise, indicating potential issues with the air conditioner or alternator belt. Signs such as shiny pulleys or belt movement may suggest a faulty idler pulley, while a loud engine squeal could indicate a failing alternator or serpentine belt. The added load from a cold battery can also contribute to slippage, especially if the serpentine belt is damp, prompting some owners to seek out updated, slip-resistant belts from dealers.