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.

Circuit Description

Fuel trim refers to feedback compensation value compared against basic injection time. Fuel trim includes short-term and long-term fuel trim.

Code is set when both short-term and long-term fuel trim are lean or rich beyond a certain value. Possible causes are:

Air intake.
Fuel line pressure.
Injector blockage or leak.
Heated oxygen sensor malfunction.
Mass Airflow (MAF) sensor.
Engine coolant temperature sensor.