How much does it cost to fix P1110?

DIY repair typically costs $15–$80 for parts. Professional repair runs $150–$600 including parts and labor.

P1110

Powertrain

Moderate

Hyundai/Kia

Electronic Throttle System (ETS) Malfunction

What could P1110 mean for your vehicle?

Add your vehicle to explore possible causes and next checks. AI guidance helps you investigate; it does not confirm a diagnosis.

The P1110 code on Hyundai and Kia vehicles indicates a malfunction in the Electronic Throttle System (ETS), which is responsible for controlling the throttle valve opening in response to driver input. Unlike older cable-operated throttle systems, modern drive-by-wire systems use electronic sensors and an actuator motor to manage the throttle. When the ECM detects a discrepancy between the accelerator pedal position and the actual throttle plate position, or other electrical faults in the system, it triggers this code and often puts the vehicle into a protective "limp mode" that limits engine power.

The most common cause is carbon buildup on the throttle body, which can restrict the throttle plate's movement and cause erratic sensor readings. A thorough cleaning of the throttle body resolves the issue in many cases. If the code appears alongside P1171 or P1196, the throttle body assembly itself is likely at fault and may need replacement.

While the vehicle can usually still be driven in limp mode, you should address this code promptly as it significantly limits your driving capability and could leave you stranded in traffic. Start by cleaning the throttle body — a relatively simple and inexpensive DIY task — and clear the code. If the problem returns, a professional diagnosis of the TPS and wiring is recommended.

Severity

Moderate — Address SoonThis Week

Symptoms

•Vehicle enters limp mode with severely reduced power
•Poor or delayed throttle response when pressing gas pedal
•Check engine light illuminated with possible ETS warning light
•Engine may idle roughly or surge unexpectedly
•Difficulty accelerating to highway speeds

Likely Causes

Faulty or carbon-fouled throttle body assembly40%

Carbon deposits on the throttle plate or bore restrict movement and cause erratic readings. When stored alongside P1171 and P1196, the throttle body assembly is almost always the root cause.

Throttle position sensor (TPS) malfunction25%

The TPS provides voltage feedback to the ECM about throttle plate angle. Internal wear or failure leads to intermittent or out-of-range signals that trigger ETS faults.

Wiring harness or connector damage20%

Corroded pins, chafed wires, or loose connectors between the throttle body and ECM cause voltage signal dropouts that the system interprets as a malfunction.

Electronic throttle control module failure15%

The ETS control module processes pedal input and commands the throttle actuator motor. Internal circuit failures can cause a mismatch between commanded and actual throttle position.