AutoCodes – Hyundai – P1404 Hyundai

P1404 Hyundai Code - DMTL Heater 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: P1404 Hyundai indicates DMTL Heater 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.

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Code Popularity 16,666

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1404 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 P1404 Hyundai - DMTL Heater Circuit - AutoCodes.com — P1404 Hyundai Code - DMTL Heater Circuit

What does this mean?

What are the Possible Causes of the DTC P1404 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 P1404 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 P1404 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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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 P1404 Hyundai Code

1. What does OBDII code P1404 for Hyundai DMTL Heater Circuit indicate?

The P1404 code specifically refers to an issue with the Diagnostic Module Tank Leakage (DMTL) system heater circuit in Hyundai vehicles.

2. What are the common symptoms of a P1404 DMTL Heater Circuit fault in a Hyundai?

Common symptoms include the illumination of the check engine light, decreased fuel efficiency, and potential difficulties passing emissions tests.

3. What are the possible causes of a P1404 DMTL Heater Circuit trouble code in a Hyundai?

Potential causes include a faulty DMTL pump, damaged wiring or connectors, a malfunctioning DMTL module, or a blown fuse related to the DMTL system.

4. How can I diagnose a P1404 DMTL Heater Circuit issue in my Hyundai?

Diagnosis typically involves using an OBDII scanner to read the error code, conducting a visual inspection of DMTL system components, and testing the DMTL system's electrical connections.

5. Can a P1404 DMTL Heater Circuit problem be fixed at home?

Depending on your level of automotive knowledge, you may be able to address the issue at home by checking and cleaning electrical connections, replacing damaged wires, or swapping out a faulty DMTL pump.

6. Is it safe to continue driving with a P1404 DMTL Heater Circuit fault code in my Hyundai?

While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent potential damage to other emissions control components and to ensure optimal vehicle performance.

7. How much does it typically cost to repair a P1404 DMTL Heater Circuit problem in a Hyundai?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $500, including parts and labor.

8. Can a P1404 DMTL Heater Circuit fault reset itself in a Hyundai?

In some cases, if the underlying issue causing the fault code is temporary, the check engine light may reset itself after a few driving cycles. However, it's still important to diagnose and address the problem.

9. Will a P1404 DMTL Heater Circuit issue affect the performance of my Hyundai?

While the immediate impact on performance may be minimal, unresolved emissions control system problems can lead to decreased fuel efficiency and potential long-term damage if left unattended.

10. How often does a P1404 DMTL Heater Circuit fault occur in Hyundai vehicles?

P1404 DMTL Heater Circuit issues are relatively uncommon in Hyundai vehicles, but they can still occur due to various factors such as age, mileage, and maintenance history.