A. check and make sure all the bulbs are working. B. someone may have replaced the blinker itself with a aftermarket one that blinks at a diff rate.
That's usually an indication of a burned out bulb.
Check all of your turn signal bulbs. One of them may be burned out.
your rear bulb is blown - replace the bulb The turn signal blinks fast because the bulb is going out. That is also why the others dont blink.
turn signal relay is bad
Changed any lamps recently and wrong replacement fitted (or if double filament, is it the right way round) or is one blown?
Buy a "highway" turn signal flasher
Flasher relay.
The check engine light comes on for numerous faults found by the computer. You will have to have the code pulled to find out why it is flashing. Most auto parts stores will do this at no cost.
Why would you want the blinker faster. They should blink at factory specs.
Check your bulbs and your flasher.
Probably needs a fuse.
turn signal relay fuse