Battery and alt. tested good... This morning on the drive to work, I made it approx. 9 miles with no issues...all of a sudden the dash tone sounded, temperature spiked and dropped, engine stumbled hard, and the TRAC light came on and stayed on
. Did this again a mile up the road, but this time I lost all control over the throttle and the brakes were very stiff and the engine was surging up and down like someone was pressing and releasing the gas pedal repeatedly. I managed to get off the road into a parking lot and shut her down. Fired it right back up and everything was normal again. It did all that again another mile up the road. Shut her down and fired her back up again and managed to make it the last 2 miles to my job. On the way home I stopped and had the CEL scanned AGAIN at auto zone and only got P0420- Catalyst efficiency low bank 1(I've been getting that code for the past year). Doesn't seem to me that its related to my issue(s).
A co-worker suggested a coolant temp sensor, but I don't see how that would affect the traction control system. Any thoughts?