OK, time to ask for help.

I purchased a 2006 LR3 V6 for cheap knowing it was in limp home mode. The owner had installed an aftermarket alternator and thought it was creating issues.

Faults: Transmission Fault, Check Brake Sensors, HDC Fault
I have:

1. Replaced brake lights with OEM
2. Replaced alternator with OEM
3. Replaced brake switch with OEM
4. New battery

GAP IID is on order. Any suggestions before it arrives? It is starting nicely now with the OEM alternator the aftermarket was leading to no start issues.

 

Battery testing ok?

Battery terminals not corroded?

Check where the ground strap connects to the body, bad connection there would cause gremlins.

Any signs of water in the floorboards?

Is the cabin air filter wet? If so it's a sign water is getting to the junction box from the cowl

 

Batteries are good. Ground strap looks solid. I’ll check again though, it’s tough to get to.

Wet on driver’s side. Passenger side less wet, but the filter was wet. It was on wet on the side closest to the center console, the side close to
the junction box was dry.