Several months ago I was driving along and my car started to miss pretty bad. The check engine light would come on intermitently as well. I took it to a local repair shop and he performed a diagnostic check and informed me that the check engine light was on due to a code #13 fault in the ecm. Subsequently, his recommendation was to perform a tuneup on the car and I agreed. When I picked up the car it was running smooth, so I thought all would be well. Unfortunately, several days passed and while driving on the highway I noticed that the car was missing just slightly and only for a few seconds. I also noticed that when the car started to miss, the check engine light would come on as well; however, after a few minutes the light would go out.
I took it back to the repair shop and had the techician run a new diagnostic check and low and behold, the same error code (#13 RPM Circuit shorted or open ) or something to that effect was present again. At this point the techician stated that it could possibly be th coil or some other devise that looks as though it is connected to the trottle body.
The car runs smooth for the most part and only during those few seconds do I notice any degradation in performance. My concern is this. Lexus parts are not cheap and I don't won't to have to spend thousand of dollar trying to fix something that may only require spending sevaral hundred dollars.
So my question is this, if anyone has had a similar experience, please advise as to what was the root cause as well as any solution that may be applicable to this issue.
Thanks, and have a very pleasant day.
Sincerely,
Todd