AutoCodes – Hyundai – P1402 Hyundai

P1402 Hyundai Code - DMTL Motor Circuit

Quick Answer

The heated DMTL (Diagnostic Module Tank Leakage) is used to monitor the evaporative system for leaks. Common causes include Faulty Diagnostic Module Tank Leakage (DMTL), Diagnostic Module Tank Leakage harness is open or shorted, Diagnostic Module Tank Leakage circuit poor electrical connection. 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 Diagnostic Module Tank Leakage (DMTL), Diagnostic Module Tank Leakage harness is open or shorted, Diagnostic Module Tank Leakage circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 22,404

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1402 Hyundai Description

The heated DMTL (Diagnostic Module Tank Leakage) is used to monitor the evaporative system for leaks. The diagnostic module consists of an air filter, an heating element, an electrical driven air pump, a change-over valve. In switched off condition the fuel tank breathes through the canister, the changeover valve and the air filter. For purging the canister, the purge control valve is opened and fresh air-flows via air filter, changeover valve and canister into the intake manifold.

OBDII Code P1402 Hyundai - DMTL Motor Circuit - AutoCodes.com — P1402 Hyundai Code - DMTL Motor Circuit

What does this mean?

What are the Possible Causes of the DTC P1402 Hyundai?

Faulty Diagnostic Module Tank Leakage (DMTL)
Diagnostic Module Tank Leakage harness is open or shorted
Diagnostic Module Tank Leakage circuit poor electrical connection

How to Fix the DTC P1402 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1402 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.

Need more information about the P1402 Hyundai code?

Need more information on how to fix the P1402 Hyundai code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1402 Hyundai code diagnosed by a professional: Find a repair shop in your area

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.