AutoCodes – KIA – P0123 KIA

P0123 KIA Code - Throttle/Pedal Position Sensor 'A' Circuit High Input

Quick Answer

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0123 KIA indicates Throttle/Pedal Position Sensor 'A' Circuit High Input.
Common causes: Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 38,221

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0123 KIA Description

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0123 KIA - Throttle/Pedal Position Sensor 'A' Circuit High Input - AutoCodes.com — P0123 KIA Code - Throttle/Pedal Position Sensor 'A' Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0123 KIA?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to Fix the DTC P0123 KIA?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0123 KIA code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0123 KIA Code

1. What are the common symptoms of OBDII code P0123 in a KIA vehicle?

- Common symptoms include issues with acceleration, poor engine performance, stalling, and the vehicle going into "limp mode."

2. What does the OBDII code P0123 in a KIA indicate?

- The code P0123 indicates a high input in the Throttle/Pedal Position Sensor 'A' Circuit.

3. What are the possible causes of OBDII code P0123 in a KIA?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

4. How can I diagnose the Throttle/Pedal Position Sensor 'A' Circuit for OBDII code P0123 in my KIA?

- Diagnose the sensor circuit using a multimeter to check for proper voltage and resistance readings, inspect wiring and connectors for damage, and perform a visual inspection of the sensor.

5. Can a dirty throttle body cause OBDII code P0123 in a KIA?

- Yes, a dirty throttle body can sometimes cause erratic readings from the throttle position sensor, triggering code P0123. It is recommended to clean the throttle body as part of troubleshooting.

6. How can I repair OBDII code P0123 in my KIA?

- Repair options include replacing the throttle position sensor if faulty, repairing damaged wiring or connectors, cleaning the throttle body, or resetting the engine control module.

7. Is it safe to drive with OBDII code P0123 in a KIA?

- It is not recommended to drive with code P0123 as it can lead to poor engine performance and potential safety hazards. It is best to address the issue promptly.

8. Can a DIY enthusiast repair OBDII code P0123 in a KIA?

- Depending on the cause, DIY enthusiasts can attempt to repair code P0123 by replacing the throttle position sensor, cleaning the throttle body, or checking and repairing wiring connections.

9. Will disconnecting the battery reset OBDII code P0123 in a KIA?

- Disconnecting the battery may temporarily clear the code, but it is important to address the underlying issue causing code P0123 to prevent it from reoccurring.

10. How can I prevent OBDII code P0123 from coming back in my KIA?

- To prevent code P0123, ensure regular maintenance of the throttle system, check for wiring damage, keep the throttle body clean, and address any issues promptly to avoid sensor malfunctions.