As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER L ENG START THE L ENG PRV STATUS MSG CAME ON. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE PERFORMED AIR SUPPLY MODULE BITE PER AMM 36-11-00. FOUND LH PRC WIRE FAULT ON. RESET FAULT, MESSAGE CLEARED. AIRCRAFT RETURNED TO SERVICE.