问：我更换了点火线圈，一个只是融化，现在它显示了一堆代码P0335/p1318/p0700/p0440。

The coil melting is the first issue to address. A possible cause of that is the 12 volt primary side supply wire to that coil is shorted to ground due to a pinched wire or other wiring fault. You can trace the supply wire of the specific coil that melted to look for that category of problem. Once that issue is resolved, erase all the codes and see which, if any, recur. If you want the coil issue, and the codes, resolved by a mechanic, the recommended service is a检查引擎灯诊断. If you request that service, the responding certified mechanic will get this diagnosed and resolved, right at your location. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.