Cars can't start diagnosis in winter.

Diagnostic section 1: battery

The weather has turned cold, and winter has arrived. The most direct impact of winter on car owners in the north is the difficulty in starting the car. At low temperature, the battery power will be higher than other seasons, just like many battery-based devices in winter always make people feel that the power is insufficient.

Solution: The technical director of Shenyang CIMC Subaru Hutai Store said that in winter, the battery will also be affected by temperature, which will reduce the capacity. In particular, some car owners will be unable to start the car because of the loss of battery power due to business trip or long-term non-driving. Normally, the service life of the battery is 2 years. If well maintained, the service life of the battery can be extended to 3 years.

If the battery of some owners' vehicles has not expired, and this happens, then you can only find friends or service personnel in 4S shops to charge your car battery through the batteries or power sources of other vehicles. After the power is restored, it is best to go to the 4S shop to check the battery to see if there is any fault.

Diagnostic site 2: exhaust pipe

In winter, many car owners are lazy and travel short distances by car. Sometimes, due to the short distance, water vapor may be generated near the exhaust pipe due to the temperature difference between hot and cold, and freezing the exhaust pipe will lead to poor automobile exhaust emission and failure to start.

Solution: Master Zhao, a mechanic in an auto repair factory, said that the solution to this situation is very simple. To solve the icing problem, we must first find ways to melt the ice in the exhaust pipe, such as pushing the car to a warmer place, or melting the ice in the exhaust pipe with a hot water bottle before starting the car. Do not bake the exhaust pipe with fire.

If you want to completely solve this problem, it is best for car owners to drive at high speed or for a long time, and completely melt and dry the ice and water vapor in the exhaust pipe through high heat.

Diagnostic Position 3: Oil

When the car is not used for a period of time, especially in winter, it is easy to make some engine oil in the car deteriorate or freeze to block the oil circuit, which increases the engine resistance and makes it difficult to start.

Solution: The manager of an automobile maintenance shop said that in winter, cars mainly go to 4S shops to check whether the oil of their cars is suitable for winter use and should be replaced in time.

For example, when the outside temperature is -30℃, it is more appropriate to choose 5W~40 engine oil; The applicable external temperature range of 10W-30 engine oil is ~25℃ to 30℃. The heat and cold resistance of 5W~40 is better than that of 10W~30, but the price will be relatively higher. The owner can choose the oil according to the local temperature.