AutoCodes – Honda – P1404 Honda

P1404 Honda Code - EGR Valve Stuck Closed

Quick Answer

The Powertrain Control Module (PCM) determines that the Exhaust Gas Recirculation (EGR) valve is stuck open if the actual EGR position and the learned closed EGR position vary by more than a predetermined value. Common causes include Faulty Exhaust Gas Recirculation (EGR) valve, Faulty Exhaust Gas Recirculation valve solenoid, Exhaust Gas Recirculation valve carbon blockage. 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 Honda indicates EGR Valve Stuck Closed.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) valve, Faulty Exhaust Gas Recirculation valve solenoid, Exhaust Gas Recirculation valve carbon blockage.
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 7,702

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 Apr 18, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1404 Honda Description

The Powertrain Control Module (PCM) determines that the Exhaust Gas Recirculation (EGR) valve is stuck open if the actual EGR position and the learned closed EGR position vary by more than a predetermined value. The PCM tests for a stuck valve when the desired EGR position is at 0%. The PCM commands the EGR valve to 100% during certain driving conditions in order to clear a possible restriction from the EGR valve if the PCM determines that the valve is stuck open. The PCM retests for a stuck valve when the desired EGR position returns to 0%. A failure timer increments if the stuck EGR valve condition is still present. This Diagnostic Trouble Code (DTC) sets when the timer reaches a predetermined value.

OBDII Code P1404 Honda - EGR Valve Stuck Closed - AutoCodes.com — P1404 Honda Code - EGR Valve Stuck Closed

What does this mean?

What are the Possible Causes of the DTC P1404 Honda?

Faulty Exhaust Gas Recirculation (EGR) valve
Faulty Exhaust Gas Recirculation valve solenoid
Exhaust Gas Recirculation valve carbon blockage

How to Fix the DTC P1404 Honda?

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 Honda 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 Honda Code

1. What are the common symptoms of OBDII code P1404 in a Honda related to the EGR valve stuck closed?

The common symptoms include rough idling, engine stalling, decreased fuel efficiency, and an illuminated check engine light.

2. What can cause the EGR valve to get stuck closed and trigger code P1404 in a Honda?

Common causes of the EGR valve getting stuck closed in a Honda include carbon buildup, a faulty EGR valve position sensor, or a clogged EGR passage.

3. How can I diagnose the EGR valve stuck closed issue causing OBDII code P1404 in my Honda?

You can diagnose the issue by performing a visual inspection of the EGR valve, checking for carbon buildup, testing the EGR valve position sensor, and inspecting the EGR passage for blockages.

4. Is it safe to continue driving my Honda with OBDII code P1404 related to the EGR valve stuck closed?

It is not recommended to drive your Honda with a stuck closed EGR valve as it can lead to engine performance issues and potential damage over time. It's best to address the issue promptly.

5. Can I clean the EGR valve to fix the stuck closed issue causing OBDII code P1404 in my Honda?

Cleaning the EGR valve may help if the issue is due to carbon buildup. However, if the valve is faulty or the problem lies elsewhere, cleaning may not resolve the issue completely.

6. What are the repair options for fixing the EGR valve stuck closed issue in a Honda triggering OBDII code P1404?

Repair options include cleaning or replacing the EGR valve, testing and replacing the EGR valve position sensor, and clearing any blockages in the EGR passage.

7. How much does it typically cost to repair the EGR valve stuck closed issue causing OBDII code P1404 in a Honda?

The cost of repairing the issue can vary depending on the extent of the problem, the need for parts replacement, and labor costs. It's advisable to consult a mechanic for an accurate estimate.

8. Can a DIY enthusiast fix the EGR valve stuck closed issue triggering OBDII code P1404 in a Honda?

While some experienced DIY enthusiasts may be able to tackle the repair, dealing with the EGR system can be complex. It's recommended to have a professional mechanic diagnose and fix the issue.

9. Will resetting the check engine light temporarily resolve OBDII code P1404 related to the EGR valve stuck closed in my Honda?

Resetting the check engine light may temporarily turn it off, but the underlying issue causing the code will remain. It's important to address the root cause to prevent further problems.

10. How can I prevent OBDII code P1404 related to the EGR valve stuck closed from occurring in my Honda in the future?

To prevent the issue, regular maintenance, such as cleaning the EGR system components, using quality fuel, and addressing any engine performance issues promptly, can help maintain the EGR system's health.