AutoCodes – KIA – P0638 KIA

P0638 KIA Code - Throttle Actuator Control Range/Performance

Quick Answer

The Powertrain Control Module (PCM) compares the actual Throttle Possition (TP) with the target TP when the engine is running. Common causes include Drive-by-wire control system malfunction, Throttle actuator malfunction, Throttle valve malfunction. 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: P0638 KIA indicates Throttle Actuator Control Range/Performance.
Common causes: Common causes include Drive-by-wire control system malfunction, Throttle actuator malfunction, Throttle valve malfunction.
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 39,539

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 May 01, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0638 KIA Description

The Powertrain Control Module (PCM) compares the actual Throttle Possition (TP) with the target TP when the engine is running. If the difference is more than the specification, the PCM determines that there is a throttle actuator control circuit range/performance problem.

OBDII Code P0638 KIA - Throttle Actuator Control Range/Performance - AutoCodes.com — P0638 KIA Code - Throttle Actuator Control Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0638 KIA?

Drive-by-wire control system malfunction
Throttle actuator malfunction
Throttle valve malfunction
PCM malfunction

How to Fix the DTC P0638 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 does this mean?

Code Tech Notes

Dirty or clogged throttle body can triggered the P0638 code. Before replacing any parts try cleaning the throttle body and reset the engine light.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0638 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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Need more information on how to fix the P0638 KIA code? Get Access to Factory Service Manuals

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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 P0638 KIA Code

1. What are common symptoms of OBDII code P0638 in a KIA related to the Throttle Actuator Control Range/Performance?

- Common symptoms include reduced engine power, stalling, poor acceleration, and the vehicle going into limp mode.

2. What are potential causes of OBDII code P0638 in a KIA?

- Potential causes may include a faulty throttle actuator, wiring issues, a malfunctioning throttle position sensor, or a problem with the engine control module.

3. How can I diagnose OBDII code P0638 in my KIA?

- Diagnosis typically involves using a scan tool to read the code, checking the throttle actuator and related components for proper operation, and inspecting wiring for any damage or corrosion.

4. Can driving with OBDII code P0638 in a KIA cause further damage?

- Continuing to drive with this code present can potentially cause damage to other engine components due to the reduced performance and possible stalling.

5. How can I repair OBDII code P0638 in my KIA?

- Repair may involve replacing the throttle actuator, repairing or replacing damaged wiring, calibrating or replacing the throttle position sensor, or reprogramming the engine control module.

6. Is it safe to continue driving my KIA with OBDII code P0638 present?

- It is not recommended to continue driving with this code present, as it can lead to unsafe driving conditions and potential further damage to the vehicle.

7. Can I reset OBDII code P0638 in my KIA using a simple OBDII scanner?

- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair OBDII code P0638 in a KIA?

- The cost of repairs can vary depending on the specific cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any DIY repair options for OBDII code P0638 in a KIA?

- DIY repair options may be limited for this code, as it often requires advanced diagnostic tools and knowledge to properly diagnose and repair the underlying issues.

10. How long does it usually take to repair OBDII code P0638 in a KIA?

- The repair time can vary depending on the exact cause of the code and the availability of parts, but it may take a few hours to a full day for a professional technician to diagnose and repair the issue.