P0638 Hyundai 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 Hyundai 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.
Code P0638 Hyundai Description
What are the Possible Causes of the DTC P0638 Hyundai?
- Drive-by-wire control system malfunction
- Throttle actuator malfunction
- Throttle valve malfunction
- PCM malfunction
How to Fix the DTC P0638 Hyundai?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0638 Hyundai 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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Frequently Asked Questions about P0638 Hyundai Code
1. What are the common symptoms of OBDII code P0638 in a Hyundai related to Throttle Actuator Control Range/Performance?
- Common symptoms include poor acceleration, reduced engine power, rough idling, and the vehicle going into limp mode.
2. What are the possible causes of OBDII code P0638 in a Hyundai related to Throttle Actuator Control Range/Performance?
- Possible causes include a faulty throttle body, damaged wiring or connectors, a malfunctioning throttle position sensor, or issues with the electronic throttle control system.
3. How can I diagnose the OBDII code P0638 on my Hyundai if I suspect an issue with the throttle actuator?
- You can use a diagnostic scanner to retrieve the trouble codes, perform a visual inspection of the throttle body and related components, and test the throttle position sensor for proper function.
4. Can a dirty throttle body cause OBDII code P0638 in a Hyundai?
- Yes, a dirty or clogged throttle body can disrupt the operation of the throttle actuator and trigger code P0638. Regular maintenance, including cleaning the throttle body, may help prevent this issue.
5. What are some repair tips for addressing OBDII code P0638 in a Hyundai related to Throttle Actuator Control Range/Performance?
- Repair tips may include cleaning or replacing the throttle body, checking and repairing any damaged wiring or connectors, calibrating the throttle position sensor, or resetting the electronic throttle control system.
6. Is it safe to continue driving my Hyundai with OBDII code P0638 related to Throttle Actuator Control Range/Performance?
- It is not recommended to continue driving with this code as it can lead to performance issues and potential safety hazards. It is best to address the underlying problem promptly.
7. How much does it typically cost to repair OBDII code P0638 in a Hyundai related to Throttle Actuator Control Range/Performance?
- The cost of repair can vary depending on the exact cause of the issue and the labor rates in your area. It is advisable to get a diagnostic assessment from a qualified mechanic for an accurate estimate.
8. Can resetting the ECU (Engine Control Unit) help clear OBDII code P0638 in a Hyundai?
- Resetting the ECU may temporarily clear the code, but if the underlying issue with the throttle actuator persists, the code is likely to return. It is important to address the root cause of the problem.
9. Are there any recalls or technical service bulletins related to OBDII code P0638 in Hyundai vehicles?
- It is advisable to check with the Hyundai dealership or manufacturer's website for any recalls or technical service bulletins related to code P0638 and the throttle actuator control system.
10. Can a DIY enthusiast repair OBDII code P0638 in a Hyundai related to Throttle Actuator Control Range/Performance?
- While some simple maintenance tasks like cleaning the throttle body can be performed by a DIY enthusiast, diagnosing and repairing complex issues related to the throttle actuator may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.
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