July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Code 27, Left Rear Wheel Speed Acceleration Fault: Notes

Each wheel speed sensor generates a signal which is proportional to wheel speed. When ABS Control Module (ACM) detects speed signal change greater than 10 MPH (16 KM/H) while vehicle is moving, it disables Anti-Lock Brake System (ABS) and turns on ANTI-LOCK warning light.