1. Pre fault symptoms: there is a strong sense of frustration when starting from 1 to 2, as well as downshifting. I didn't care at that time, because I had this feeling all the time in the first half of this year, but it gradually strengthened.

2、故障现象：在环线上导航时突然降到D3,且雪地和运动模式不停闪烁，SERVICE灯报警。停车熄火，再上电后也有报警显示变速箱故障，但2秒后消失。继续行走，加速到60码以上上述现象再次出现。一路上一直采用上述方法重复了3次停车熄火。以后干脆让它报警，变速箱锁定到D3，不超过60码开到4S店。

2. Fault phenomenon: when navigating on the loop line, it suddenly drops to D3, and the snow and movement mode keep flashing, and the service light gives an alarm. Stop the engine and turn on the power, there will be an alarm to show the gearbox fault, but it will disappear after 2 seconds. Continue to walk, accelerate to more than 60 yards, the above phenomenon appears again. The above method has been used for three times to stop the engine. In the future, simply let it alarm, lock the gearbox to D3, and drive to the 4S store within 60 yards.

3、送4s处理：4s店显然熟悉该故障情况，我只是提到可能是电磁阀原因，检修人员通过电脑联机简单检测后为压力调节故障。现场判断为主油压电磁阀问题。当时询问4S是否是保修，因为我整车质保2年已过期。不置可否，只是说要到上面请示。

3. Send to 4S for treatment: the 4S store is obviously familiar with the fault, I just mentioned that it may be the cause of the solenoid valve, and the maintenance personnel simply detected the pressure regulation fault through the computer online. The main oil pressure solenoid valve was judged on site. At that time, I asked the 4S whether it was a warranty, because the warranty of my whole car had expired for two years. I'm not sure. I just want to go up there and ask for instructions.

过会儿请示结果下来，表示免费更换，但是要求3万大保养顺便在他那里做了。我当即表示没有问题，因为我本来就是准备要做了，而且在淘宝上三滤，火花塞都买好了放车上，并且当即在4s购买了total7000机油。

After a while, I asked for the result and said that it would be replaced free of charge, but I asked for 30000 major maintenance, and I did it at his place by the way. I immediately said that there was no problem, because I was ready to do it, and I bought three filters and spark plugs on Taobao and put them on the car, and I immediately bought total7000 engine oil in 4S.

4、排除：你们应该看到前面文字中的红色字体了吧，问题就出在这里，液力控制板(也叫油路板)更换电磁阀后再安装上去后就出现噪音大。感谢4s店的师傅尽责尽力，更换后检查到了这个板子问题，可能是与电磁阀不匹配，也可能是板子还有其他故障没有检查到。

4. Troubleshooting: you should see the red font in the front text. The problem is that the hydraulic control board (also called oil circuit board) is noisy after replacing the solenoid valve and then installing it. Thanks to the master of the 4S shop, he did his best. After the replacement, he found the problem of the board. It may be that it does not match the solenoid valve, or it may be that the board still has other faults.