AutoCodes – Acura – P1404 Acura

P1404 Acura 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 Acura 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 3,469

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 Acura 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 Acura - EGR Valve Stuck Closed - AutoCodes.com — P1404 Acura Code - EGR Valve Stuck Closed

What does this mean?

What are the Possible Causes of the DTC P1404 Acura?

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

How to Fix the DTC P1404 Acura?

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 Acura 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 P1404 Acura code?

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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 Acura Code

1. What are the common symptoms of an EGR valve stuck closed (OBDII code P1404) in an Acura?

The common symptoms include rough idle, engine hesitation, decreased fuel efficiency, and potential engine knocking or pinging noises.

2. What typically causes the EGR valve to get stuck closed in an Acura?

The EGR valve can get stuck closed due to carbon buildup, a faulty EGR valve position sensor, or a blocked EGR passageway.

3. How serious is the issue of an EGR valve stuck closed in an Acura?

While the vehicle may still be operable with this issue, it can lead to increased emissions, poor engine performance, and potential long-term damage if left unresolved.

4. Can driving with an EGR valve stuck closed cause further damage to the vehicle?

Continued driving with a stuck closed EGR valve can cause damage to the engine over time, potentially leading to more costly repairs.

5. What are some repair tips for addressing the OBDII code P1404 in an Acura with a stuck closed EGR valve?

Common repair steps include cleaning the EGR valve, checking for vacuum leaks, testing the EGR valve position sensor, and inspecting the EGR passageway for blockages.

6. How can I prevent the EGR valve from getting stuck closed in my Acura?

Regular maintenance, such as cleaning the EGR valve and passageways, using high-quality fuel, and addressing engine issues promptly, can help prevent the EGR valve from getting stuck closed.

7. Can I drive my Acura with the EGR valve stuck closed until I can get it repaired?

It is not recommended to drive your Acura with a stuck closed EGR valve for an extended period, as it can lead to decreased engine performance and potential long-term damage.

8. How much does it typically cost to repair an EGR valve stuck closed in an Acura?

The cost of repairing an EGR valve stuck closed can vary depending on the extent of the issue, but it may range from $200 to $500 for parts and labor.

9. Will resetting the OBDII code P1404 in my Acura make the issue of the stuck closed EGR valve go away?

Resetting the OBDII code may temporarily turn off the check engine light, but it will not fix the underlying issue of the stuck closed EGR valve. It is important to address the root cause of the problem.

10. Is it possible to clean the EGR valve myself to fix the issue of it being stuck closed in my Acura?

Cleaning the EGR valve yourself is possible for some DIY enthusiasts, but it requires proper tools and knowledge. If you are unsure, it is recommended to consult a professional mechanic for assistance.