My istop and master warning light lately been going cranky.
The master warning light was Amber
Istop light was Amber and blinking.
Had to reset the istop and it went back to normal.
Try the following
On your engine, let it warm up a while.
Once done, switch off.
On the car to the acc mode (without switching on the engine)
Within a few seconds of oning the acc mode
Hold onto the istop button for a few seconds till you heard the beep sound.
Hold on for another 5 seconds after the beep.
Let go then on your car engine.
The istop should be Amber (without blinking, meaning istop is off)
Press the istop off button again to switch on the istop.
It should be blinking green.
Leave the car to idle till the Amber blinking disappear.
Then drive around a while to make sure it all goes back to normal.
Repeat again if it does not work.
Do take note this helped me from goin to the workshop a couple of times.
But still monitoring if it's really my battery going cranky.
Hope this helps anyone else out there.