Code 41 - Air/Fuel Learning Control

NOTE: Refer to illustration for ECU connector and terminal identification. See Figure -Figure .

Ensure fuel injectors, mass airflow sensor, engine coolant temperature sensor, throttle position sensor, oxygen sensor, and fuel pressure are operating within specifications. See CODES 14, 15, 16 & 17, FUEL INJECTOR; CODE 23, MASS AIRFLOW SENSOR; CODE 21, COOLANT TEMPERATURE SENSOR; CODE 31, THROTTLE POSITION SENSOR; and CODE 32, OXYGEN SENSOR (O2S). Repair as necessary. If systems are okay, repair ECU harness connector or replace ECU.