Electronic Throttle System Malfunction
2011-2015 Kia Optima 2.4L I4
Description
The PCM has detected a general malfunction in the Electronic Throttle Control system. The throttle body is not responding correctly to accelerator pedal input, and the system may enter limp mode to protect the engine.
Symptoms
- Check Engine Light
- Reduced engine power (limp mode)
- Throttle response sluggish or unresponsive
- Engine may idle only
- ETC warning light on
Common Causes
- Faulty electronic throttle body
- Accelerator pedal position sensor failure
- Wiring issue in ETC circuit
- Carbon buildup preventing throttle plate movement
- PCM ETC driver failure
Diagnostic Steps
- Check for companion ETC codes
- Monitor throttle position vs accelerator pedal position on scan tool
- Inspect throttle body connector and wiring
- Clean throttle body plate and bore
- Test accelerator pedal position sensor
Repair Notes
Clean the throttle body first; replace the throttle body assembly if the motor or internal sensors have failed.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1110 on Other Vehicles
Common Questions
What does code P1110 mean on a 2011-2015 Kia Optima?
P1110 stands for "Electronic Throttle System Malfunction". The PCM has detected a general malfunction in the Electronic Throttle Control system. The throttle body is not responding correctly to accelerator pedal input, and the system may enter limp mode to protect the engine.
What are the symptoms of P1110 on a Kia Optima?
Common symptoms of P1110 include: Check Engine Light, Reduced engine power (limp mode), Throttle response sluggish or unresponsive, Engine may idle only, ETC warning light on.
What causes P1110 on a 2011-2015 Kia Optima?
Common causes of P1110 include: Faulty electronic throttle body, Accelerator pedal position sensor failure, Wiring issue in ETC circuit, Carbon buildup preventing throttle plate movement, PCM ETC driver failure.