I've had this happen multiple times. No rhyme or reason. It happens more to me when I'm at a cruising speed, but have had it happen while accelerating. I don't know what they'd even look at without a check engine light coming on.
Current- 2016 Race Red Focus ST1
Traded In - Sedan Revolution #249 - 2012 SE Sport - ╠╬╝ - Ingot Silver - 201A - K&N w/ snorkel delete - Blox Type R Knob