What does the 157+18 fault code mean?

[StAsher]

1. Excessive carbon deposits in the intake system and at the root of the intake valve: Causes the air-fuel mixture to be too lean during cold starts. Solution: Clean the intake system. 2. Severely dirty throttle body: Insufficient air intake. Solution: Clean the throttle body. 3. Starter motor speed: The starter motor speed does not meet the required level. Solution: Increase the starter motor speed. More relevant information is as follows: Note 1: The air filter is directly related to the engine's air intake during driving. A Guangqi Honda dealership manager mentioned that if the vehicle is only driven in urban areas, the air filter may not get clogged. However, if the car is driven on dusty roads, special attention should be paid to the cleanliness of the air filter. Note 2: If the air filter becomes clogged or accumulates too much dust, it can restrict the engine's air intake. Additionally, a large amount of dust entering the cylinders can accelerate carbon buildup, leading to poor engine ignition, insufficient power, and naturally increased fuel consumption. For normal city driving, the air filter should be inspected every 5,000 kilometers.