Fast Idle/Runs On [SKYACTIV-G (Us)]: Notes

FAST IDLE/RUNS ON [SKYACTIV-G (US)] DETECTION CONDITION AND POSSIBLE CAUSE

Troubleshooting item	Fast idle/runs on
Description	Engine speed continues at fast idle after warm-up. Engine runs after ignition is switched off.
Possible cause	Cooling system malfunction PCM DTC is stored Accelerator pedal stuck depressed Erratic signal to PCM APP sensor or related circuit malfunction Clutch stroke sensor or related circuit malfunction (MTX) Communication error between TCM and PCM (ATX) ECT sensor No. 1 or related circuit malfunction ECT sensor No. 2 or related circuit malfunction A/F sensor or related circuit malfunction HO2S or related circuit malfunction Improper load signal input Improper A/C request signal Improper operation of drive-by-wire control system Throttle body malfunction Fuel injector malfunction Spill valve control solenoid valve malfunction (built-into high pressure fuel pump) Air leakage from intake-air system Injector driver (built-into PCM) malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Highly pressurized fuel may spray out if the fuel line is cut. Due to the following dangers occurring with a fuel spray, always complete the "Fuel Line Safety Procedure" to prevent the fuel from spraying. (See BEFORE SERVICE PRECAUTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))] .) (See BEFORE SERVICE PRECAUTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))] .) Fuel may cause irritation if it comes in contact with skin and eyes. If fuel ignites and causes a fire, it may lead to serious injury or death, and damage to property and facilities. Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. Always refer to the "Quick Release Connector Removal/Installation (fuel system)" before performing the fuel hose installation, and execute the "Fuel Leakage Inspection" after installation. (See QUICK RELEASE CONNECTOR (FUEL SYSTEM) REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))] .) (See QUICK RELEASE CONNECTOR (FUEL SYSTEM) REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))] .) (See AFTER SERVICE PRECAUTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))] .) (See AFTER SERVICE PRECAUTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.
System wiring diagram	Not applicable
Connector diagram	Not applicable

CAUTION:

Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.