Can a corroded battery wire cause a check engine light on?
Well, yes and no, it depends. Many of the sensors on modern vehicles use voltage as a control. If the sensors detect lower than expected voltage due to poor electrical connections, that could cause a check engine light. However, once the car has been started and is running, most (if not all) voltage is supplied directly by the alternator and not the battery.
根据朋友们的建议敲了Starter, 几乎发动起来. 请各位看下面三个视频, 会是什么问题
After he knocked the starter:
The first video is his first try. There is spark at the positive wire connected the battery..
Then he tightened the wing nut and the car started for a bit (second video).
The third video shows his the third try.
Now he suspects the contact is not good. He plans to wire brush the contact and purchase hex nuts tomorrow so he can get a better connection.
Plus: he replaced the wire connections 3 years ago. i suspected he didn't do the good job.
https://photos.google.com/share/AF1QipNNKv4ik7QOBDFD1eFVe4z0gAbQ9Q6rUn4NdwjxkEBZtecBKue3HFQ2UKCZFRrSYQ/photo/AF1QipPUxB9O2GI42O-UZUYJGdJj9CWtZDawxzA_BrIW?key=eFlFaEFHdGdyY1NsNlBZdnBKRERYWkdiM1B3MmFR
https://photos.google.com/share/AF1QipNNKv4ik7QOBDFD1eFVe4z0gAbQ9Q6rUn4NdwjxkEBZtecBKue3HFQ2UKCZFRrSYQ/photo/AF1QipMZA_31qbetMVa9PNCF-rz4BlYdgxQSIbdIMT6Z?key=eFlFaEFHdGdyY1NsNlBZdnBKRERYWkdiM1B3MmFR
https://photos.google.com/share/AF1QipNNKv4ik7QOBDFD1eFVe4z0gAbQ9Q6rUn4NdwjxkEBZtecBKue3HFQ2UKCZFRrSYQ/photo/AF1QipP5MGaUcux7LTDAtzUYB671o7NFZFzAy6Ko1h5k?key=eFlFaEFHdGdyY1NsNlBZdnBKRERYWkdiM1B3MmFR
汽车车辆上的启动机敲几下就可以正常使用原因一是电机碳刷磨损或接触不良，二是开关触点接触不良导致的。
It cranked didn't it? Then the starter was not the problem, the problem was the loose contact of the battery, that's why it sparked at the first try.
Not the starter?
觉得您需要仔细清理电池红色接线柱、检查跟红色接线柱连接的电线是否多股铜丝断了若干股？刚点火时听声音starter是正常的，如果电池跟starter之间的电线接触不良的话starter得不到持续的大电流供应（需要几秒钟）也会启动失败。
It didn't at the beginning was because that the loose connection couldn't pass enough current to the starter needed to turn the engine over.
送去修车辅的话二话不说立马给你换个starter先赚你个两三百再花半分钟把电池cable拧拧紧。
要我帮你修的话？把电池接线端拧拧好，不换starter,再注意观察starter以后的表现。最多要你30。
让儿子给电池连接部位照些特写，看看到底啥情况。
对于电池一个普遍的误区是--只要电池连接的端点螺栓上紧，就是好连接----实际中，由于电池极柱是由铅制，偏软，其直径会变小，直到直径小到connector 的螺丝再怎么紧固也不能提供良好连接，此时就要换connector了。
另外，电池是否固定良好，也是一个重要因素。
Cranked but no firing? Engine faled to run when he let the key go?
Well, yes and no, it depends. Many of the sensors on modern vehicles use voltage as a control. If the sensors detect lower than expected voltage due to poor electrical connections, that could cause a check engine light. However, once the car has been started and is running, most (if not all) voltage is supplied directly by the alternator and not the battery.
(https://www.quora.com/Can-a-bad-battery-connection-cause-a-check-engine-light-What-problems-can-corroded-battery-terminals-cause)