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Hey guys, I need some serious help. I'm trying to tighten up my everyday driver, 130,000 mile 2003 C5, and I've got some code issues. I was hoping if I I could get some input. I had these codes, along with the messages about Service Traction etc. They would reset and not be on whenever I started the car, and wouldn't display until I hit approximately 65 mph. I took the car to a trusted mechanic and he replaced the right front hub assembly after using his scanner on the car
C1227 LR Excessive wheel speed variation
C1228 RR "
C1233 RF Wheel speed circuit open of short
C1234 LR "
C1235 RR "
C1248 I can't find this code on my list
Now, I'm still getting the service messages and yellow dash lights when I hit 65 mph, but I'm just getting C1233. Its never there when I start the car, but when I hit around 65, it comes back. Any ideas?