Probable Causes

Loose Engine Ground
Open E1 Circuit
Open Injector Circuit
Open Or Short In Oxygen Sensor Or Circuit
Fuel Line Pressure (Blocked Injector)
Ignition System
Coolant Temperature Sensor
Airflow Meter Or Air Intake System (3S-GTE)
Vacuum Sensor
ECM

For oxygen (O2) sensor or circuit testing, see Code 21. For injector or circuit testing, see TEST 13 - INJECTOR CIRCUIT .

NOTE: Diagnostic chart not available from manufacturer.