Hey all -
Were you all able to get the problem fixed?
I have an 2006 IS 250 and had a similar issue with my car. Last Oct/Nov the check engine and check VSC lights came on. I also started noticing that my engine felt like it wanted to cut out intermittently when I would come to a stop (slow or fast, didn't matter).
When I took it in to have it looked at, they told me nothing showed up on the diagnostic tests. But interesting enough, my service rep said he was going to "send a report to corporate to see what the next step would be". I didn't question it at first - I was just happy to hear my car was fine. But then in the 2-3 weeks I spent waiting to hear back from him - the lights came on again! Needless to say, I was peeved - I demanded to work with another rep... come to find out, corporate gave approval for replacement of all my engine valves since they were faulty. If this was the case - why didn't they tell me that from the get go instead of saying everything was normal! Luckily I was still under warranty so it was all covered - but that major repair would have cost 6K+.
But guess what, now 6 months later, I'm having that same shuddering in the engine!! I'm taking it in on Monday - so we'll see what they have to say.
Oh BTW - I had to press them on the problem and apparently the 2nd rep was honest enough to tell me this was a problem they were seeing with some frequency in the 2006 IS 250 models. Any one else have a similar experience??