So when I turn on ignition it shows 12,2 but after second it drops to 11,8. If I hold/flash headlights it drops to 11,6-5. When I start the engine it goes up to 13+ , then after let's say 2 minutes 14,3. Key doesn't work properly , I mean it takes longer to unlock or start car. On my Lexus is250 key unlocks car straight away . Is250 has new battery and refurbished alternator. Just for clarity , gs450h that we are talking about is my father's it's 2008. Is250 is mine.
I don't understand why obd2 scanner doesn't show any errors on gs450h