As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT COWL ANTI-ICE MASTER CAUTION ILLUMINATED AT 90 KTS ON TAKEOFF ROLL. EXTINGUISHED ON ITS OWN CLIMBING THROUGH 2000 FT. GROUNDED - YES. REMOVED ENGINE ANTI ICE VALVE PER B737-9 AMM 30-21-11-000-801. INSTALLED LH COWL ANTI ICE VALVE UP TO AMM 32-21-11-400-801.