Had my strut replaced on right front. Right
headlight also. Abs speed sensor not working on
right side damaged from accident. Drove car for
about 30 min now engine light on. What could it be
If the ABS sensor was damaged and not repaired the ABS light will be on and the ABS may not work. The CEL is telling you that there are trouble codes to be read. Find out what they are and post them here.
Code for 2010 Hyundai Elantra.is is P0501
Perhaps this will help ----- https://www.yourmechanic.com/article/p0501-obd-ii-trouble-code- vehicle-speed-sensor-range-performance-by-jay-safford
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