October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Fuel Trim Enable
YES/NO: This parameter indicates when the
VCM is using Fuel Trim values to adjust fuel delivery to the engine. Fuel trim will be disabled when the vehicle is not in Closed Loop, malfunction codes related to fuel trim are set, large amounts of purge vapor are ingested by the engine, or additional diagnostics that temporarily affect Fuel Trim operation are active.