We have a 2002 Chevy Impala that the ABS, Traction Control and Check Engine lights stay on constantly. We have just replaced both front wheel bearings, (one of them twice), rotors, brakes and new tires all around. We have had a GM dealer look at it and they got the lights to go off, said it was a loose connection. But now their right back on. My husband is a machine mechanic
and also does most or all of the work on our cars. He has a high end OBM code reader that also reads ABS. We are getting the codes B1221, B1226, B1232, B1233, and B1245. What could be causing these codes and could you tell me what we need to replace, to be able to clear them and not have them keep coming back on?