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P1738 Hyundai Code - Shift System Time Out

Quick Answer

The P1738 Hyundai diagnostic trouble code (DTC) indicates a shift system time out, which means that the automatic transmission control module has detected an issue with the shift system's timing. Common causes include Malfunctioning shift solenoid, Faulty transmission control module, Low transmission fluid levels. 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
P1738 Hyundai indicates Shift System Time Out.
Common causes
Common causes include Malfunctioning shift solenoid, Faulty transmission control module, Low transmission fluid levels.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1738 Hyundai Description

The P1738 Hyundai diagnostic trouble code (DTC) indicates a shift system time out, which means that the automatic transmission control module has detected an issue with the shift system's timing. This code typically points to a problem with the transmission's ability to shift gears properly, leading to potential drivability issues. The transmission control module relies on various sensors and solenoids to ensure smooth shifting between gears, and any interruption in this process can trigger the P1738 code.

OBDII Code P1738 Hyundai - Shift System Time Out
P1738 Hyundai Code - Shift System Time Out

Common Causes of P1738 Hyundai

  1. Malfunctioning shift solenoid
  2. Faulty transmission control module
  3. Low transmission fluid levels
  4. Dirty or contaminated transmission fluid
  5. Wiring issues or electrical problems

Symptoms of P1738 Hyundai

  1. Harsh or delayed shifting between gears
  2. Slipping gears
  3. Transmission goes into limp mode
  4. Check engine light illuminated
  5. Reduced fuel efficiency

How to Fix P1738 Hyundai

  1. Perform a diagnostic scan to retrieve the P1738 code and any related codes
  2. Inspect the transmission fluid level and condition, top off or replace if necessary
  3. Check the shift solenoids and transmission control module for proper operation, replace if faulty
  4. Inspect wiring harness and connectors for any damage or corrosion, repair as needed
  5. Clear the trouble codes, road test the vehicle to ensure proper shifting operation

Cost to Fix P1738 Hyundai

The cost of repairing a P1738 Hyundai code can vary depending on the specific cause of the issue. On average, the repair costs can range from $200 to $800, including parts and labor. However, it's important to note that the actual cost may be higher or lower based on the severity of the problem, the need for replacement parts, and the labor rates at the auto repair shop. It's recommended to obtain a detailed estimate from a qualified mechanic to understand the exact cost of addressing this issue. Labor rates at auto repair shops typically range between $80 and $150 per hour, but can vary based on location and other factors.

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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 P1738 Hyundai Code

1. What are the common symptoms of OBDII code P1738 in a Hyundai related to the Shift System Time Out issue?

The common symptoms include difficulty shifting gears, delayed shifting, and potential hesitation or jerking during acceleration or deceleration.

2. What are some possible causes of the OBDII code P1738 Shift System Time Out in a Hyundai?

Potential causes may include low transmission fluid levels, a faulty transmission control module, issues with the shift solenoids, or electrical problems within the transmission system.

3. How can I diagnose the OBDII code P1738 in my Hyundai related to the Shift System Time Out?

Diagnosing the issue involves conducting a thorough inspection of the transmission fluid level, checking for any leaks, performing a scan using an OBDII scanner to retrieve the specific error code, and inspecting the transmission control module and related components.

4. What are some repair tips for resolving the OBDII code P1738 Shift System Time Out in a Hyundai?

Repair tips may include checking and topping up transmission fluid levels if low, inspecting and possibly replacing faulty shift solenoids or the transmission control module, and ensuring all electrical connections are secure and functioning properly.

5. Can driving with the OBDII code P1738 Shift System Time Out in my Hyundai cause further damage?

Continued driving with this issue may lead to further damage to the transmission system, potentially resulting in more severe issues and costly repairs. It is recommended to address the problem promptly.

6. Is it safe to continue driving my Hyundai with the OBDII code P1738 Shift System Time Out present?

It is not advisable to continue driving the vehicle with this code present, as it could lead to erratic shifting behavior and potential safety hazards. It's best to address the issue as soon as possible.

7. Will resetting the OBDII code P1738 Shift System Time Out in my Hyundai temporarily solve the problem?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, the problem is likely to reoccur. It is important to diagnose and repair the root cause of the code.

8. How much does it typically cost to repair the OBDII code P1738 Shift System Time Out in a Hyundai?

The cost of repair can vary depending on the specific cause of the issue and the labor rates in your area. It is recommended to consult with a qualified mechanic or dealership for an accurate estimate.

9. Is the OBDII code P1738 Shift System Time Out a common issue in Hyundai vehicles?

While not extremely common, OBDII code P1738 related to the Shift System Time Out can occur in Hyundai vehicles, particularly in older models or those with high mileage. Regular maintenance and prompt attention to any warning lights can help prevent such issues.

10. Can I fix the OBDII code P1738 Shift System Time Out in my Hyundai myself, or should I seek professional help?

Depending on your experience and expertise with automotive repairs, you may be able to address some aspects of the issue yourself, such as checking transmission fluid levels. However, complex repairs involving the transmission system should be handled by a qualified technician to ensure proper diagnosis and resolution.

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