AutoCodes – Jeep – P1404 Jeep

P1404 Jeep Code - EGR Position Sensor Rationality Closed

Quick Answer

The Exhaust Gas Recirculation (EGR) valve recirculates exhaust gas to the engine intake for increased efficiency, lower fuel consumption, and reduced NOx emissions. 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 Jeep indicates EGR Position Sensor Rationality 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 36,308

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 Jeep Description

The Exhaust Gas Recirculation (EGR) valve recirculates exhaust gas to the engine intake for increased efficiency, lower fuel consumption, and reduced NOx emissions. The valve changes the air's chemical makeup by adding exhaust gas, which dilutes the mixture and lowers combustion temperatures, resulting in less NOx production. The valve has two primary settings: open and closed, depending on the engine's power requirements. EGR valves can also improve combustion efficiency, reduce pumping losses, and decrease diesel knock at idle.
The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module (ECM) detects EGR flow or movement when it is not expected.

OBDII Code P1404 Jeep - EGR Position Sensor Rationality Closed - AutoCodes.com — P1404 Jeep Code - EGR Position Sensor Rationality Closed

What does this mean?

What are the Possible Causes of the DTC P1404 Jeep?

Faulty Exhaust Gas Recirculation (EGR) Valve
Faulty Exhaust Gas Recirculation Valve Solenoid
Exhaust Gas Recirculation valve carbon blockage

How to Fix the DTC P1404 Jeep?

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 Jeep 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 Jeep Code

1. What are the common symptoms of OBDII code P1404 in a Jeep related to the EGR Position Sensor Rationality Closed?

The common symptoms include rough idling, engine hesitation, reduced fuel efficiency, and an illuminated Check Engine Light.

2. What are the possible causes of OBDII code P1404 in a Jeep?

The code P1404 in a Jeep is typically triggered by issues with the EGR valve, EGR position sensor, wiring harness, or the PCM (Powertrain Control Module).

3. How can I diagnose the cause of OBDII code P1404 in my Jeep?

Diagnosing the code involves checking the EGR valve and position sensor for proper operation, inspecting the wiring for any damage, and using a scan tool to monitor EGR system parameters.

4. Can I continue driving my Jeep with OBDII code P1404 active?

While it may be possible to drive the vehicle with the code active, it is not recommended as it can lead to further engine damage and reduced performance. It's best to address the issue promptly.

5. How can I repair OBDII code P1404 in my Jeep?

Repairing the code may involve cleaning or replacing the EGR valve, replacing the EGR position sensor, repairing any damaged wiring, or reprogramming the PCM.

6. Are there any DIY tips for fixing OBDII code P1404 in a Jeep?

DIY tips include checking and cleaning the EGR valve, ensuring proper electrical connections, and using a multimeter to test the EGR position sensor.

7. How much does it typically cost to repair OBDII code P1404 in a Jeep?

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

8. Can a faulty EGR valve cause OBDII code P1404 in a Jeep?

Yes, a faulty EGR valve can cause code P1404 in a Jeep if it fails to provide the correct feedback to the PCM regarding the EGR position.

9. Will resetting the Check Engine Light make OBDII code P1404 disappear permanently?

Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue causing P1404 is not addressed, the code is likely to reappear.

10. Is it necessary to visit a mechanic for OBDII code P1404 diagnosis and repair, or can I fix it myself?

While some DIY fixes are possible, it is recommended to have a professional mechanic diagnose and repair OBDII code P1404 in a Jeep to ensure a proper and long-lasting solution.