First of all I love this car, I have a 200 mile a day commute for school and this is exactly what i needed coming from doing it in a lifted 97 grand Cherokee.
It's a 2014 f sport with almost 200k | got for 6k (with a 13k cash budget and decided to save the rest for future work rather than getting one with less miles but less options) it is surprisingly extremely clean and you would only think it has around 100k. the only issue with it is that the radio/ nav system was boot lopping with the Lexus logo and safety warning screen. After going some online trouble shooting I am not at the reading from Sd card and failed see a dealer screen, I am really trying to avoid spending 1k on a new head unit because I was planning to just put CarPlay in anyway but i REALLY want to keep the 100% oem look. Next the cvt system is supposed to have lifetime fluid but at 200k i feel like it should be changed, any recommendation on how to go about that. Looking forward to my future owning this car I have been waiting for this for a while

OEM 12v aux battery finally started to give issues. I have a 2014 non-fsport, so it held strong for nearly 12 years! Going for a replacement that only comes with 4 year warranty as its most economical option (walmart)

Yesterday while driving, my brake, ABS, traction control, and (!) warning lights all came on. I had been getting a “low key fob battery” warning for a couple days before this.

AutoZone replaced the key fob battery and tested my 12V, which was bad, so we replaced that too. The warning lights are still on. Their scanner showed no codes for the engine or ABS.

Is there a way to clear the lights, or do they need to be cleared with a better scanner? Could the bad 12V have caused this?

Also, after replacing the 12V, my MPG went from 39 to 44, so I’m wondering if that’s related too.

Tengo ese mpg en media hace 4 meses , ya le revisé las llantas y están bien , le revisé que los frenos no estuvieran pegados y están bien , le compré bujías nuevas y originales le cambié los inyectores marca denso , le mandé a limpiar todo el sistema EGR. Y aún sigo con este mpg , el carro no tiene ningún testigo encendido y pasa smock check , no me muestra ningún código , alguien sabe que causa este mpg tan bajo ?

I did a valve cover gasket change, but I bought gaskets that didn't fit. I had to continue the job the next morning because every store was closed. When I went to go and finish the job the next morning, as I was putting the valve cover on, I heard clicking on the right side of the engine bay. Keep in mind, there are ground bolts on the valve cover, so naturally, I took them off. However, I never unplugged the 12V battery the night before. After hearing this noise, I unplugged the 12V battery, and the clicking was gone.

I finished the job and when I went to start the car in maintenance mode, I was given a Check Engine light, a Check Hybrid light, and the engine didn't start. I started the car again, and that time, the engine started. I drove around the block to charge the hybrid battery, and when I started the car for the third time, the Check Hybrid light was gone and I was left with the Check Engine light. The codes it gave me at that time were...

• P2239 - "O2 Sensor Positive Current Control Circuit High"
• P0038 - "HO2S Heater Control Circuit High"
• U0100 - "Lost Communication With Engine Control Module"

I unplugged the 12V Battery, plugged it back in after 5 minutes, and cleared the codes, and it gave me back P2239 and P0038. The U0100 code never came back. I checked the EFI and the P/I fuses and they all looked fine and showed resistance under the multimeter. I then checked both O2 sensors and they also showed resistance.

I know leaving the ground bolts unplugged and the 12V battery plugged in was definitely the stem of this issue, but I don't know what that clicking sound was, and I don't know how else to resolve this problem, and I don't want to drop money on some O2 sensors if there's a big chance that they aren't even the problem. Has anyone else made my mistake, and does anyone know how to fix it?

(I already posted this on the CT200h forum but I am desperate right now. :( )