I had the same problem w/ my ES...
The problem was the idle being set to low.
Normal rpm is set at around 1500 but mine was bottoming out under 0. Especially when I slowed down from braking.
When I started my car my rpm would barely jump.
It's a really simple fix..
Just as yur Mechanic to turn yur idle control up.
Yu can actually do it yourself no problem.
Hope it helps....