P1190 - FAULT CODE - OBD2

P1190 HYUNDAI, KIA: INPUT THROTTLE ACTUATOR MALFUNCTION

The throttle actuator installed on modern vehicle systems is fully computerized (wireless). It is used to control or regulate the amount of air flowing to the engine through the driver’s accelerator pedal.

When the flaps in the inlet passage are actuated, the passage in the cylinder inlet valve is usually narrowed and this action reduces the airflow. The flaps in the intake passage are controlled by the intake throttle actuator. The duty cycle for the inlet passage closure is switched on and off utilizing the inlet passage closure function switch.

If factors such as engine speed and demand quantity plus low idle speed governor exceed the permissible levels, the MAF Sensor signal must be above a threshold. If not, it would be recognized as a “closed cap locked” error. If the engine speed and duty cycle exceed certain thresholds, the digital closed input step switch must be activated. This situation is recognized as a “flap locked open” error.

DTC P1190 OBDII is set on Hyundai and Kia vehicles when the erratic operation of the throttle input actuator is discovered.

• Check Engine light illuminated.
• Engine stalls while running.
• The engine does not start or has difficulty starting.
• Voltage drops off the vehicle.

The factors for which the P1190 OBD2 diagnostic code is stored are:

• The throttle solenoid valve connections or wiring could have been damaged.
• The throttle solenoid valve may be in poor condition.
• The Engine Control Module (ECM) could be faulty.
• Defect in the OCV (Oil Control Valve).
• Low oil level in the engine.
• Oil could be dirty.
• The on-board computer may be in bad condition.
• Error in the PCM.

The corresponding steps to resolve the P1190 OBDII fault code are:

• Consult the Technical Service Bulletins. The solution to this problem may be known by the manufacturer and is included in these bulletins.
• Inspect all wiring along with the throttle solenoid valve circuit connections. If you discover damage caused by burning or wear, make the necessary repairs.
• Check the throttle solenoid valve for damage. Measure its resistance and compare it with the value specified by the manufacturer. If you find an out-of-range value, make the appropriate corrections.