Check Engine Light On problems of the 2007 Lexus IS250

Vsc light, check engine light, traction control light all came on at the same time. Po303 cylinder 3 misfire detected. Have saw online many people complaining of the same problem. Engine is shaky during idle or shaky when its cold. Previous owned a 2009 Lexus Is250 and had the same problem. Heard of some people saying Lexus dealers took cars in and had problem fixed as recall. Not finding any recalls for my car. My mechanic says its a good running car, but something doesn't feel right.

Check engine, vsc, traction lights comes on as vehicle comes to a stop with a rough idle, and at times exhibits a temporary loss of power intermittently, while the vehicle is mobile/rolling. Lexus sent out a tsib letter to us owners for similar symptoms with possible diagnostic trouble codes(dtc): p0300-p0306. Further, according to Lexus corp. "the check engine light may illuminate for reasons of unrelated condition. " Lexus corporation suspects the cause of problem is carbon deposit accumulation in the intake valves and a replacement of piston ring set and or pistons may be indicated. If this is what's occurring inside the engine and is inherent to Is250 models only ,then it would seem to a reasonable person there is a design and potential safety flaw in these vehicle models. Also, because of this design flaw, my vehicle is now having catalytic failure and a what sounds like a rattle during a cold crank start of the vehicle. However, when a vehicle is taken to a dealer, the Lexus dealers are quick to dismiss the problem by the claims that the symptoms are not replicable enough for them to verify the problem. The temporary loss of power may one day cause the driver to have a serious accident should the steering wheel lockup or should the problem happen during hill ascends, which may cause the vehicle to roll back into traffic or off the main road. Why is Lexus corporation not making this issue a safety recall, and rather, just treating it as a concern nature. I would beseech the traffic safety board to please look into this matter as to avoid any injury or worse, a loss of innocent life. This is my first Lexus vehicle and it has become a very disappointing experience.

At approximately 40,000 mi. My 2007 Lexus is 250 developed a problem of stalling, shaking, misfiring and the vsc light, traction skid light and check engine lights all come on. The dealership initially tried to tell me that the gas cap was not on tight (not true) and then they tried to tell me that just turning the lights off would fix the problem (also not true). After I insisted that the problem was serious and dangerous, the technician drove the car home and had the same problem that I had been experiencing. Finally, the dealership decided that carbon had built up on the valves and that was causing the engine to misfire and all the lights to come on. The dealership sent the valves to a shop and had them cleaned and ground down. The service manager told me that there was a design flaw and this is what Lexus told them to do to fix it. Now, here I am at 81,000 miles and the same thing happened again yesterday with the car shaking, stalling, misfiring and the vsc light, traction skid light and check engine lights coming on. It has been another 40,000 miles and the carbon has built up again. I have read on the internet that many other people have had the same problem.