Three problems related to check engine light on have been reported for the 2006 Lexus IS250. The most recently reported issues are listed below.
I entered the highway as I usually do on my way to work and had made my way to the left lane. I am in rush hour traffic when all of a sudden my car started to loose compression, it started to slow down to about 25 miles (while on a main highway) and a check engine light came on and the vcs notification started flashing. I immediately made my way to the shoulder on the right side of the highway to look-up the code and all it said was to take to the Lexus dealer immediately, which is what I did. After about four hours of waiting, the Lexus dealer determined that my 2006 Lexus needed: valve springs, valve lash adjuster, updated pistons and rings and possibly a short block. Yes the engine was bad.
I own a 2006 Lexus Is250 and there is a problem that I cannot see to handle nor the dealer can handle. The problem with the car is that when I'm going over 60 to 65 mph the check engine light blinks and the vsc light comes on. The car does not accelerate and just the rpm would go up. I took the car in to the dealer with extended warranty in hand on 4 now 5 different occasions and everytime I'm hearing different stories. Here is the list. * may 22, 2009: 60,000 mile service done. * sept 6, 2009: took the car in for "check vsc & check engine". Next day they told me nothing was wrong with the car. * oct 10, 2009: towed car to dealership. "check vsc & check engine" light came on again. Pulled over on the highway 3 times to reset but the lights did not go away. Pulled over twice earlier that day, twice the day before also. * oct 14, 2009: (Lexus told you that the issues were resolved by swapping the engine coils the day or two before. No charges. ) I requested an emissions test before I came to pick it up. Lexus called back and told me that the engine light came back on again during the emissions test. Still looking for the problem. * oct 18, 2009: Lexus called, told me that the problem with the engine is because of the carbon buildup. They were going to cover the valve springs but I would have to pay for the cleanup which is $ 960. Not covered by ext. Warranty. 2 other dealers told me that the carbon buildup cleanup was an injunction service and it is supposed to only cost 190 dollars. The funny thing is that the dealer wrote the problem is caused by "carbon buildup cleanup?" with a question mark. Took the car and had the injunction service done. I took the car to another Lexus dealer and they told me that while the other dealer was doing the coil swap they cracked the cover for it and now gas was leaking. Had to get it fixed and also did the carbon buildup cleanup (injunction service). Feb 2010 same problem occurred.
Car started to run rough, slowed down, check engine light and sbs light came on (ithought it was an oxygen sensor). Book says to take to dealer immediately. I took it in, they did a check, told me it was a 'loose gas cap'. A month later - same thing happened. I took it back, they kept the car for two weeks - told me the valve springs were not the correct length and had to be replaced.