My car is starting on its own?

Hi,

Were there any electrical issues prior to disconnecting the battery? I ask because this is an odd one.

Does the vehicle have a factory remote start system or has someone installed an aftermarket one? Let me know that information so I can look at the correct wiring schematic for the starter circuit. If it doesn't, then we have a traditional starter relay. If it does have a factory remote start, it is designed differently.

Also, let me know if anything other than the sensors were replaced.

Let me know.

Joe

Hi,

Nothing you have done should have caused this to happen. To me, it sounds like there is an issue with the electrical box.

Does it still do the same thing? Do the lights turn on and the starter engages when the battery is connected? Also, I want you to remove the starter relay and see if the starter still engages. It is located in the fuse/relay box.

There is also a headlamp relay in the same box. Check it as well.

Here is a link that explains how to check a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

I attached the wiring schematic for the starter circuit so that you would have a reference. I had to cut it in half to make it readable, but I did overlap the two so you can follow from one to the next.

Let me know what you find.

Joe

See pics below. Also, if the dealer that sold you the vehicle provided a warranty, you may want to contact them. As mentioned, you did nothing wrong, and I suspect the problem is in the fuse box.

Hi,

Vehicles, in general, have become confusing for all of us. The number of possible causes of issues has grown beyond belief.

As far as the starter and the rough running is concerned, it may take a bit for the modules to relearn things before the engine runs smoothly. That isn't uncommon when the battery is disconnected.

Don't feel confused. It happens to all of us. LOL. My best friend disconnected the battery on his 2018 Altima and now the engine won't crank at all. I get to figure that one out tomorrow.

Let me know if there is anything I can help with. Also, let me know if all prior issues are resolved. It sounds like they are.

Take care and Happy Thanksgiving.

Joe