Driving when Hybrid battery needs replacement.

[Fergal Deasy]

Is it ok to drive my gs300h while I am awaiting replacement hybrid Battery. 

[NemesisUK]

The hybrid Battery provides all the electrical power for the car, steering assist, lights and of course spinning the electric motor/generator to start the petrol engine ....

[westo3]

2014 and the hybrid needs replacing already??

[royoftherovers]

On 12/6/2022 at 8:49 PM, Fergal Deasy said:

Is it ok to drive my gs300h while I am awaiting replacement hybrid battery. 

What was the diagnosis which lead to the need to replace the Hybdrid Battery Fergal ?

Was it diagnosed, ordered by and will it be replaced by Lexus ? 

[Herbie]

On 12/6/2022 at 8:49 PM, Fergal Deasy said:

Is it ok to drive my gs300h while I am awaiting replacement hybrid battery. 

It sort of depends how bad it is and if it holds any charge at all and for how long. Easy answer is no, don't do it, don't even think about it because far too many things could go wrong.

The 12V Battery boots the computers, pressurises the brakes and gets the hybrid system into READY mode.

Hybrids don't have a starter motor. The system energises MG1 and uses this to spin the petrol engine up to 1,000rpm, at which point it applies both fuel and spark to ignite it. There is no alternator either; it's the hybrid system that supplies the low voltage, via a DC/DC converter, to run the 12V services such as lights, radio, charge the 12V Battery and so on. The power steering is also driven by a 48V motor that again is controlled by the hybrid system, as are a lot of other things.

When so much is dependent on the high voltage batteries, would you really be willing to take a risk and run the car?

Like everyone else, I'm wondering what symptoms and diagnostics LED you to believe that the hybrid Battery needs replacement, especially with it being so young?