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P1404 Hyundai Code - DMTL Heater Circuit

Quick Answer

The P1404 code for Hyundai vehicles refers to an issue with the DMTL (Diagnostic Module Tank Leakage) heater circuit. Common causes include Faulty DMTL heater circuit, Wiring issues or shorts in the circuit, Corrosion or damage to the DMTL sensor. 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 DMTL heater circuit, Wiring issues or shorts in the circuit, Corrosion or damage to the DMTL sensor.
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 P1404 Hyundai Description

The P1404 code for Hyundai vehicles refers to an issue with the DMTL (Diagnostic Module Tank Leakage) heater circuit. The DMTL system is responsible for monitoring the fuel tank for leaks and evaporative emissions. The heater circuit in the DMTL system is designed to heat up the sensor to ensure accurate readings. When this circuit malfunctions, it can lead to inaccurate readings and potentially affect the vehicle's emissions system.

OBDII Code P1404 Hyundai - DMTL Heater Circuit
P1404 Hyundai Code - DMTL Heater Circuit

Common Causes of P1404 Hyundai

  1. Faulty DMTL heater circuit
  2. Wiring issues or shorts in the circuit
  3. Corrosion or damage to the DMTL sensor
  4. ECM (Engine Control Module) malfunction
  5. Poor electrical connection

Symptoms of P1404 Hyundai

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

How to Fix P1404 Hyundai

  1. Diagnose the issue using a diagnostic scanner to confirm the P1404 code and pinpoint the exact cause of the problem.
  2. Inspect the DMTL heater circuit, wiring, and sensor for any damage or corrosion. Repair or replace as needed.
  3. Check the ECM for any malfunctions or errors. Reset or reprogram if necessary.
  4. Clear the code from the vehicle's memory and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, seek professional help from a certified mechanic for further diagnosis and repair.

Cost to Fix P1404 Hyundai

The cost to repair a P1404 DMTL heater circuit issue can vary depending on the extent of the damage and the specific cause of the problem. On average, the repair costs can range from $150 to $400, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary widely, with hourly rates typically ranging from $80 to $150. Additional diagnostic time may also be needed to pinpoint the exact cause of the issue, which can impact the overall repair cost. It's recommended to consult with a trusted mechanic to get a more accurate estimate based on your vehicle's make and model.

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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.

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