hybrid poa7f ony when kickdown

[lucas]

hi.i am lucas.new here just joined.

i was hoping if you guys could help me out as 1 week ago i became a gs450h owner...its a 2006.it is a lovely car.i fell in love with cvt and the car itself. But there we go.i am getting poa7f and occasionaly poa80.i bought mini vci cable so i keep monitoring whats going on.on sunday i have taken the Battery out and cleaned bus bars hoping to resolve the problem.if there is no code displayed the system charges and discharges and i can run on Battery and the car feels normal.what i have established is that if i dont use a kickdown the code will not come up.i can accelerate hard but as long as the pedal doesnt go into kickdown then its ok.but if i use it and check the techstream straight away it shows as a pending code poa7f. do i have to recondition Battery?is it ny only option or it can be caused by something else?thnx in advance.

[Britprius]

2 hours ago, lucas said:

hi.i am lucas.new here just joined.

i was hoping if you guys could help me out as 1 week ago i became a gs450h owner...its a 2006.it is a lovely car.i fell in love with cvt and the car itself. But there we go.i am getting poa7f and occasionaly poa80.i bought mini vci cable so i keep monitoring whats going on.on sunday i have taken the battery out and cleaned bus bars hoping to resolve the problem.if there is no code displayed the system charges and discharges and i can run on battery and the car feels normal.what i have established is that if i dont use a kickdown the code will not come up.i can accelerate hard but as long as the pedal doesnt go into kickdown then its ok.but if i use it and check the techstream straight away it shows as a pending code poa7f. do i have to recondition battery?is it ny only option or it can be caused by something else?thnx in advance.

Hi Lucas.

As your probably aware POA7F is the code for Battery deterioration, and POA80 is the code for replace the Battery.

The best advice I can give is to contact LOC member Richard "Hybrid Battery solutions", and discus the problem with him. There should be sub codes pointing to the modules in the Battery that are week. The reason you are getting the fault on full acceleration "there is no kick down" is that on full acceleration the Battery is fully loaded using the electric motor drive for maximum acceleration.

John

[Farqui]

Hi Lucas, welcome to the forum.

I'm sorry to hear that you have issues with your recent purchase, did you acquire the vehicle from a dealer (not necessarily a Lexus dealer)?  If you weren't aware of the issue when purchasing the vehicle then you have the right to allow the dealer to resolve the issue at not cost to you.  If you were aware then the purchase price should have been lowered in order for you to address the fault.

Does the vehicle have a full service history?  Or a full Lexus service history?

When was the vehicle last serviced?  Was this done by Lexus?  If so, then they perform a Hybrid health check and if it passes will warranty the hybrid drive for another 12 months until the vehicle is 10 years old(140k miles?).

The Hybrid system really needs a specialist to take a look and as John / @Britprius recommends, fellow LOC member Richard / @hybridbatterysolutions has a good working knowledge of Hybrids.

Thankfully you seem to be able to use the vehicle, at least for now...

Good luck resolving the issue and do let us know how you get on.

[lucas]

well so i contacted richard and booked it in the next 2 weeks so there is that.

car drives fine now if i dont press the accelerator beyond the click.which even in techstream is described as kickdown even tho i was corrected by britprius(i am not arguing just saying ;) ) that there is no such thing. :)

anyway.hopefully richard will make my new to act as it should. 

[Britprius]

Hi Lucas. I am sure Richard will put things right for you.

For clarification the reason I say there is no kick down is that the GS hybrid along with all the other Toyota derived hybrids until this year "things have changed from now" is that the vehicles only have one gear ratio, and further it is permanently fixed in this ratio. It has no reverse, and no neutral. Everything is accomplished electrically buy varying the speed, direction, or if the electric motors are being supplied with current or producing current as a generator or allowed to spin freely. Even engine starting is done with the same motors. There is no normal starter motor or alternator. So you cannot kick down into another ratio that does not exist.

John. 

[lucas]

well..all that is beyond my knowledge.haha all i know is that in my lex when i make the accelerator click all hell unleashes and i shoot forward..haha..thanks for the response.

[KimiD]

Hello my lex gs450h gave me a code POA7F when the check engine light came on. A day later it’s off. Do I need a new Battery? I also saw someone mentioned about buying new cells- what’s the difference