What does a large F on the HOWO dashboard mean?

[MacAubrey]

Reason: It indicates high water temperature or insufficient coolant; insufficient brake fluid or low tire pressure; it may also be related to the handbrake. Insufficient coolant: Lack of coolant or improper selection can fail to dissipate the heat generated by engine components in time, leading to high water temperature and elevated engine temperature. Low tire pressure: While low tire pressure can improve tire grip, it causes large areas of the tire to contact the ground during driving, increasing fuel consumption. Prolonged extensive friction can easily raise the internal tire temperature, causing gas expansion. Additionally, it may lead to excessive wear in certain parts of the tire, shortening its lifespan, and increasing the risk of sidewall bending or breaking, which can result in a tire blowout.