As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FUEL LO PRESS CAUTION INFLIGHT WHEN THRUST REDUCED TO FLIGHT IDLE WHEN THRUST BROUGHT BACK UP, MESSAGE DISSAPPEARED. CLEANED CONNECTOR AT FUEL LOW PRESSURE SWITCH. PERFORMED OPS CHECK PER AMM 73-31-06, AND AMM 71-00-00. COULD NOT REPRODUCE LEFT FUEL LOW PRESSURE CAUTION MSG.