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

DTC 71: Different Diameter Tire

Clear the DTC (see HOW TO CLEAR DTCS ).
Test-drive the vehicle.
Does the ABS indicator come on, and is DTC 71 indicated?
1. YES - Make sure all four tires are the specified size and are inflated to proper specification.
2. NO - Intermittent failure; the vehicle is OK at this time.