Hello all,

I had a freak experience on the road with my ESP locking up my wheels and engine and am having trouble finding anything online. Any help would be appreciated.

I have a 2002 C230 coupe. I hit a pothole a month ago and saw an ESP light come on a couple of times, about a week apart. Ultimately last week, my ESP light started to flash and I started hearing intermittent grinding noises and my car jerked forward and back. I pressed ESP OFF on the dash but it did little. I finally pulled over and the car said to see the shop. My mechanic told me that 2 codes came up: C1120 and C1140.

Do these codes both pertain to the yaw sensor?
Do they apply to the steering angle sensor by any chance?
Does the yaw sensor go bad on its own or did the pot hole do some damage (mechanic said wheels looked ok)?
Can I install a used yaw sensor without getting anything calibrated?

Thank you.

 

Following up for others: Someone at a different forum provided a list of codes for the exact model and year and pointed out that it's the rear left speed sensor. I replaced the rear left speed sensor, reconnected my ABS system, and the issue went away and hasn't resurfaced in over 2k miles.