Every once in a while while driving approx 60mph my car will give a very strong jolt or jerk for a second if I release or press the gas pedal very very slightly. At first I thought it was a harsh torque convertor lock up or something and I kind of ignored it but it has been doing it more and more often lately. Yesterday it did it and all of a sudden the check engine light came on and so did a little wrench light? It also went into a limp mode or something because it had no power. I shut it off and restarted the engine. Check engine light was still on but the wrench was off now. I took it home and scanned it and got code p061B. This has me thinking maybe the TB is dirty and is sensitive to the drive by wire throttle??? It has new plugs and fuel filter and runs like a top other than this. Should I just try clean the TB up and see what happens? Thanks.