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P1402 Hyundai Code - DMTL Motor Circuit

Quick Answer

The P1402 diagnostic trouble code (DTC) for Hyundai vehicles refers to an issue with the DMTL (Diagnostic Module Tank Leakage) motor circuit. Common causes include Faulty DMTL motor, Wiring or electrical issues in the DMTL motor circuit, Corrosion or damage to DMTL system components. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P1402 Hyundai indicates DMTL Motor Circuit.
Common causes
Common causes include Faulty DMTL motor, Wiring or electrical issues in the DMTL motor circuit, Corrosion or damage to DMTL system components.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1402 Hyundai Description

The P1402 diagnostic trouble code (DTC) for Hyundai vehicles refers to an issue with the DMTL (Diagnostic Module Tank Leakage) motor circuit. The DMTL system is responsible for monitoring the fuel tank for leaks and evaporative emissions. When this code is triggered, it indicates a problem with the DMTL motor circuit, which can have implications for the vehicle's emissions system and overall performance.

OBDII Code P1402 Hyundai - DMTL Motor Circuit
P1402 Hyundai Code - DMTL Motor Circuit

Common Causes of P1402 Hyundai

  1. Faulty DMTL motor
  2. Wiring or electrical issues in the DMTL motor circuit
  3. Corrosion or damage to DMTL system components
  4. Vacuum leaks in the evaporative emissions system
  5. Software or programming issues with the vehicle's engine control module (ECM)

Symptoms of P1402 Hyundai

  1. Check engine light illuminated
  2. Reduced fuel efficiency
  3. Increased emissions
  4. Failed emissions tests
  5. Rough idling or stalling

How to Fix P1402 Hyundai

  1. Diagnose the issue using a scan tool to retrieve the specific trouble codes and identify the source of the problem.
  2. Inspect the DMTL motor circuit for any visible damage, corrosion, or loose connections.
  3. Test the DMTL motor for proper function and replace if necessary.
  4. Check for vacuum leaks in the evaporative emissions system and repair as needed.
  5. Clear the trouble codes and perform a test drive to ensure that the issue has been resolved.

Cost to Fix P1402 Hyundai

The cost of repairing a P1402 DTC may vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the parts for this repair may range from $100 to $300, while the labor costs can add an additional $100 to $200. Overall, the total repair cost for addressing a P1402 DMTL motor circuit issue could range from $200 to $500. It's important to note that these estimates are rough averages, and actual costs may vary based on the vehicle's make and model, location, and the extent of the repairs needed. It's recommended to obtain a detailed quote from a trusted auto repair shop before proceeding with the repairs.

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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 P1402 Hyundai Code

1. What are the common symptoms of OBDII code P1402 Hyundai (DMTL Motor Circuit)?

The common symptoms include the check engine light illuminating on the dashboard, rough idling, decreased engine performance, and possible fuel odor.

2. What are the potential causes of OBDII code P1402 in a Hyundai related to the DMTL Motor Circuit?

Possible causes include a faulty DMTL pump motor, damaged wiring or connectors in the DMTL circuit, or a malfunctioning DMTL module.

3. How can I diagnose the DMTL Motor Circuit issue triggering OBDII code P1402 in my Hyundai?

Diagnosis typically involves using a scan tool to retrieve the specific trouble code, checking the DMTL pump motor for proper function, inspecting related wiring and connectors for damage, and testing the DMTL module.

4. Can a DIY enthusiast repair OBDII code P1402 related to the DMTL Motor Circuit in a Hyundai?

Depending on your skill level, you may be able to replace the DMTL pump motor, repair damaged wiring or connectors, and reset the code. However, if you are unsure, it's best to consult a professional mechanic.

5. Is it safe to continue driving with OBDII code P1402 triggered by a DMTL Motor Circuit issue in my Hyundai?

It's generally not recommended to drive for an extended period with this issue, as it can affect your vehicle's performance and emissions. It's best to address the problem promptly.

6. How much does it typically cost to repair OBDII code P1402 related to the DMTL Motor Circuit in a Hyundai?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Can a faulty DMTL Motor Circuit impact the overall performance of my Hyundai vehicle?

Yes, a malfunctioning DMTL Motor Circuit can lead to decreased engine performance, rough idling, and potentially affect the emissions control system of the vehicle.

8. Will resetting the OBDII code P1402 related to the DMTL Motor Circuit resolve the issue in my Hyundai?

Resetting the code may temporarily turn off the check engine light, but if the underlying problem is not addressed, the code is likely to reoccur. It's crucial to diagnose and repair the root cause.

9. How long does it typically take to repair the DMTL Motor Circuit issue causing OBDII code P1402 in a Hyundai?

The repair time can vary based on the exact cause of the problem and the availability of parts, but it may take anywhere from 1 to 3 hours to complete the repair.

10. Can extreme weather conditions affect the DMTL Motor Circuit and trigger OBDII code P1402 in a Hyundai?

Extreme temperatures or moisture can potentially impact the DMTL Motor Circuit components, leading to malfunctions and triggering the OBDII code P1402.

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