Ive had my 2008 RX400H for almost 3 years and it has been faultless , taken from 88,000 to 110,000 miles
Last Friday morning with heavy overnight snow I started the car and put on heaters and left the car for 15 mins to warm through. When I returned the engine was off but heaters on. I turnd the ignition off but when I tried to start the car a short while later it would not go. I tried it again 30 minutes later and it was fine. Ive used the car for last few days including 2 journeys of over 100 miles without problem.
Today, I was driving along when the message 'CHECK HYBRID SYSTEM' appeared on dash. I continued to my destination ok, but when I tried to start the car I got the same message and it wouldn't drive.
A quick google and I disconnected 12v battery for 10 minutes then reconnected and the car started / drove. However the 2 messages CHECK HYBRID SYSTEM - CHECK VSC SYSTEM appeared on dash , I drove home, parked on my drive and the car again will not start.
Does this sound like a 12V battery problem ? Sounds unlikely that hybrid and VSC would fail on same day.
The 12V battery looks old and was on the car when I bought it March 2020 and could be much older.
If I did replace the 12V battery would the system also need reset ?
Any suggestions welcome.
Thanks