KimFeng

Yes, indeed. Everything odd will come up once the battery is down. Had a great lesson from it. 🤣

Thank you for making that clear. It is all sorted now, it turns out the battery is not holding the charge at all, and it is completely damaged. Once the new battery is put in, everything is back to normal. Thank god there is a garage near me (50 metres away from my house). Thank you for every one's help!

Tried to jump start it this morning, and it seems won't recharge. Also shows the message 'check hybrid system, which seems a bad news. After 10 mins, I tried to jump start again, nothing happened, the car is still dead. Do I need to replace the whole hybrid system in that case or just the battery?

Apologise for not saying clearly, my intention was to get it recharged and then go to garage to get the battery replaced. I do not want to pay hundred quid to get it towed to the garage, although that is my final option.

Thanks for the statement, because the car was starting to act odd, key not detected even the key is in the car and in working order. I bought this and try to recharge the battery. Hopefully this will work. https://www.amazon.co.uk/gp/product/B08ZSBRW6Q/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

29k miles from 2014, barely drive it.

But today the car is completely dead, even the message did not show up any more. I am hoping it is just the battery is dead.

Thank you for the advice. I have tried to unlock the alarm with the key, but the fob was not doing anything even I can see the red dot flashing on the key. I assume the key still have active battery?

Thank you for the help! I will try that later (at work)as it seems that is the only way so far, I hope it is just the flat battery problem rather than other electrical issues. 'Key not detected' gave me quite a scare, I thought the sensor for the key fob was broken. I saw a thread saying that if the battery is flat too long or too low, it will not recognise the fob, and it needs to be reprogrammed. Also, will the alarm go off if I charge from the back?

That sounds like a plan! Thanks for that! I was charging the battery from the front, is it ok for that? I quickly disconnected the cable once the alarm went off, ang got em brassed as in the open area.

Thank you for the reply. I am trying to change the key fob battery today, but now the car seems to have complete flat battery. The alarm went off when the cables were attached to the battery, so I assume it was charging the battery?

Hi, Thank you for your reply! I was trying to charge the battery, but the alarm kept going off. So I had to remove the jump start cable. The thing is that I am not able to reach the back of the car as there is no power to open the boot.

Good morning everyone, I have a question about my CT200H, and hoping you guys can help me out. My Lexus has not been driven for a month's time (maybe more). I was trying to get it started yesterday, but unfortunately, the battery was dead and not allow me to open the door remotely. I had to open the driver's door with the key inside the fob. I was trying to jump start it as it happened before. This time, however, the alarm was set off, and I could not turn it off with my fob. So I disconnected it, and the little screen showed 'key not detected' with a flashing triangle warning sign when I pressed the start button. Today, I tried it again, the battery was completely dead and nothing happened even I pressed the start button. I want to know what happened to my car, is it the battery problem or other problems? I hope you guys can help me out as Dealership is the least favour place I want to go. Thank you so much!