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P1773 Hyundai Code - Gearbox Input Speed Sensor

Quick Answer

The P1773 diagnostic trouble code (DTC) for Hyundai vehicles specifically points to an issue with the gearbox input speed sensor. Common causes include Faulty gearbox input speed sensor, Electrical issues, Sensor damage. 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
P1773 Hyundai indicates Gearbox Input Speed Sensor.
Common causes
Common causes include Faulty gearbox input speed sensor, Electrical issues, Sensor damage.
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 Oct 02, 2025
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Code P1773 Hyundai Description

The P1773 diagnostic trouble code (DTC) for Hyundai vehicles specifically points to an issue with the gearbox input speed sensor. This sensor is a crucial component of the vehicle's transmission system, as it is responsible for monitoring the speed of the input shaft in the gearbox. By constantly measuring the speed at which the input shaft rotates, the sensor helps the transmission control module (TCM) to determine the optimal gear ratio for smooth shifting and overall performance.
OBDII Code P1773 Hyundai - Gearbox Input Speed Sensor
P1773 Hyundai Code - Gearbox Input Speed Sensor

Common Causes of P1773 Hyundai

  1. Faulty gearbox input speed sensor
  2. Electrical issues
  3. Sensor damage
  4. Wiring harness problems

Symptoms of P1773 Hyundai

  1. Erratic shifting patterns
  2. Delayed or harsh gear changes
  3. Transmission slipping
  4. Transmission going into limp mode

How to Fix P1773 Hyundai

  1. Diagnose the issue by using a scan tool to read the DTC and confirm the problem with the gearbox input speed sensor.
  2. Locate the sensor, which is typically located on the transmission housing.
  3. Inspect the sensor, wiring, and connectors for any visible damage or wear.
  4. Replace the faulty gearbox input speed sensor with a new, OEM-quality sensor.
  5. Clear the DTC from the vehicle's computer system and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1773 Hyundai

The typical repair costs for addressing a P1773 code related to the gearbox input speed sensor can range from $150 to $300, including parts and labor. However, it is essential to note that the specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is recommended to inquire about local rates for a more accurate estimate.

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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 P1773 Hyundai Code

1. What does the OBDII code P1773 indicate for a Hyundai?

P1773 refers to an issue with the gearbox input speed sensor, which monitors the rotational speed of the transmission input shaft.

2. What are common symptoms of the P1773 code in a Hyundai?

Symptoms may include erratic shifting, transmission slipping, reduced fuel efficiency, or the check engine light turning on.

3. What causes the P1773 code to be triggered?

It can be caused by a faulty input speed sensor, damaged wiring, poor electrical connections, or issues in the transmission system.

4. Can I drive my Hyundai with the P1773 code?

Driving with this code can lead to further damage to the transmission. It’s best to address the issue promptly.

5. How do I diagnose the P1773 code on a Hyundai?

Diagnosis involves using an OBDII scanner, inspecting the input speed sensor, checking the wiring and connectors, and testing the sensor's functionality.

6. How can I fix the P1773 code on a Hyundai?

Repair options include replacing the faulty speed sensor, repairing or replacing damaged wiring, or resetting the transmission control module.

7. How much does it cost to fix the P1773 code on a Hyundai?

The cost can vary, but replacing the input speed sensor typically ranges from $150 to $300, depending on labor and parts.

8. Can a dirty transmission fluid cause the P1773 code?

Yes, dirty or low transmission fluid can affect sensor readings and trigger the code.

9. How do I prevent the P1773 code from recurring?

Regular maintenance of the transmission system, including fluid changes and inspections, can help prevent this code.

10. Will resetting the check engine light clear the P1773 code permanently?

Resetting the light may clear the code temporarily, but the underlying issue must be fixed to prevent it from returning.

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