Circuit Description

WARNING: This page is about a different car, the 1995 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.

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.