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.

Conditions For Running DTC

DTCs P0121, P0122, P0123, P0221, P0222, P0223 are not set.
The engine is running for more than 0.5 second.
The ignition 1 voltage is more than 11 volts.

DTC sets when MAF sensor voltage is less than 0.14 volt (less than zero grams per second).