SES is airbag/restraint related. Check engine lights are typically abbreviated to CELs, although the proper technical term is malfunction indicator light (MIL)
Buy a cheap code reader at AutoZone, it'll come in handy for things like these. Try swapping OČ sensors and see if it goes away.
2007 Mitsu Eclipse GT-V6
- Injen CAI, Tanabe STB, Tanabe UB, Progress RSB, Moog PS rear links, TWM GS STS w/Big Type R knob & aluminum base bushings, Torque Solution shifter cable bushings, Redline MT-90 transmission fluid (coming soon) Show-off thread!
1986 Pontiac Bonneville V6
- Stock w/upside down carb lid (+25hp)