I haven't found a solution for my problem on the forum.

My car is stuck in fail safe mode. It's reading many codes.
Transmission fault, electrical fault, brake fluid low, suspension fault, incorrectly fitted part, asc not available. When I press on the brakes, the headlights go out. The car won't start. I've hard resetted. Replaced negative battery wire. Cleaned and checked bulk head, all good. What can I do?

 

Info for you.

bob

 

Thank you for your reply. Unfortunately, that wasn't the issue.

 

The following is the best course of trouble shooting.
1. Clear all existing codes with an OBD scanner.
2. Pull the battery out and have it load tested.
3. Reinstall the battery and connect the positive cable, take the ground cable and hold it against the positive terminal for 30 seconds. This will give the module a hard reset. Then connect the negative cable and operate the vehicle.
4. Recheck the codes that come up and post the numbers and we can help from there.

When you have multiple codes you have no way of knowing which are current and which are historic. A weak and failing battery will throw all kinds of codes because the modules are not receiving the needed voltage and unsure of what to do.