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P1404 RAM Code - EGR Position Sensor Rationality Closed

Quick Answer

The P1404 diagnostic trouble code (DTC) indicates an issue with the Exhaust Gas Recirculation (EGR) Position Sensor rationality being closed. Common causes include Faulty EGR Position Sensor: A defective sensor can send incorrect signals to the ECU, triggering the P1404 code, Malfunctioning EGR Valve: A stuck or faulty EGR valve can cause issues with the EGR system's operation, Electrical Issues: Problems with the wiring, connectors, or circuits related to the EGR Position Sensor can lead to sensor rationality issues. 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 RAM indicates EGR Position Sensor Rationality Closed.
Common causes
Common causes include Faulty EGR Position Sensor: A defective sensor can send incorrect signals to the ECU, triggering the P1404 code, Malfunctioning EGR Valve: A stuck or faulty EGR valve can cause issues with the EGR system's operation, Electrical Issues: Problems with the wiring, connectors, or circuits related to the EGR Position Sensor can lead to sensor rationality issues.
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 09, 2024
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Code P1404 RAM Description

The P1404 diagnostic trouble code (DTC) indicates an issue with the Exhaust Gas Recirculation (EGR) Position Sensor rationality being closed. The EGR system plays a crucial role in reducing harmful emissions by recirculating a portion of exhaust gases back into the intake system to be re-burned. The EGR Position Sensor monitors the position of the EGR valve to ensure it is functioning correctly and adjusting the flow of exhaust gases as needed.

OBDII Code P1404 RAM - EGR Position Sensor Rationality Closed
P1404 RAM Code - EGR Position Sensor Rationality Closed

Common Causes of P1404 RAM

  1. Faulty EGR Position Sensor: A defective sensor can send incorrect signals to the ECU, triggering the P1404 code.
  2. Malfunctioning EGR Valve: A stuck or faulty EGR valve can cause issues with the EGR system's operation.
  3. Electrical Issues: Problems with the wiring, connectors, or circuits related to the EGR Position Sensor can lead to sensor rationality issues.
  4. Clogged EGR System: Build-up of carbon deposits or debris in the EGR system can obstruct the flow of exhaust gases, causing sensor irregularities.

Symptoms of P1404 RAM

  1. Check Engine Light: The most common symptom associated with the P1404 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A malfunctioning EGR system can lead to decreased fuel efficiency as the engine may not be operating optimally.
  3. Rough Idle: The engine may experience rough idling or hesitation when the EGR system is not functioning correctly.
  4. Increased Emissions: The vehicle may fail emissions tests or emit higher levels of pollutants when the EGR system is not working properly.

How to Fix P1404 RAM

  1. Diagnose the Issue: Use a scan tool to retrieve the DTC and perform a visual inspection of the EGR system components.
  2. Test EGR Position Sensor: Check the sensor's resistance and operation to determine if it is functioning correctly.
  3. Inspect EGR Valve: Verify the EGR valve's operation and clean or replace it if necessary.
  4. Check Electrical Connections: Ensure all wiring and connectors associated with the EGR system are intact and functioning properly.
  5. Clear DTC and Test Drive: After completing repairs, clear the DTC, and test drive the vehicle to confirm the issue has been resolved.

Cost to Fix P1404 RAM

The cost of repairing a P1404 code can vary depending on the root cause of the issue and the vehicle's make and model. On average, the parts for this repair can range from $50 to $200, while labor costs typically fall between $100 and $300. This estimate does not include diagnostic fees, taxes, or other potential expenses. It's essential to consult with a qualified mechanic to get an accurate quote based on your specific circumstances. Labor rates at auto repair shops can vary, so it's advisable to inquire about local rates before proceeding with the repair.

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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 RAM Code

1. What does the OBDII code P1404 mean on a RAM vehicle?

P1404 indicates an issue with the Exhaust Gas Recirculation (EGR) Position Sensor, specifically that the EGR valve is not closing as expected or the sensor is providing irrational readings.

2. What are the common symptoms of code P1404 in a RAM vehicle?

Symptoms may include poor engine performance, reduced fuel efficiency, rough idling, the Check Engine Light turning on, and increased emissions.

3. What causes the P1404 code to appear on a RAM vehicle?

Common causes include a stuck EGR valve, carbon buildup in the EGR system, a faulty EGR position sensor, wiring issues, or a malfunctioning PCM.

4. Can I still drive my RAM with a P1404 code?

While the vehicle may still be drivable, ignoring the issue can lead to reduced performance, higher emissions, and potential damage to other engine components over time.

5. How can I fix the P1404 code on my RAM?

Start by cleaning the EGR valve and checking for carbon buildup. If the problem persists, inspect the EGR position sensor, wiring, and connectors, and replace faulty components if necessary.

6. How do I diagnose a P1404 code on a RAM vehicle?

Use an OBDII scanner to confirm the code, then inspect the EGR valve for movement and carbon deposits. Test the EGR position sensor and wiring for continuity and proper operation.

7. Can a bad PCM cause the P1404 code in a RAM?

Yes, a malfunctioning PCM could incorrectly interpret EGR sensor data or fail to control the EGR valve properly, though this is less common.

8. How much does it cost to repair a P1404 code in a RAM vehicle?

The cost depends on the issue. Cleaning the EGR valve may cost $100-$200, while replacing the EGR valve or position sensor could range from $200 to $500, including labor.

9. Will a P1404 code cause my RAM to fail an emissions test?

Yes, a stuck EGR valve or improper EGR function can increase emissions, which may result in failing an emissions test.

10. Can cleaning the EGR valve resolve the P1404 code on my RAM?

In many cases, cleaning the EGR valve to remove carbon deposits can resolve the issue. If cleaning doesn’t work, further diagnostics are needed.

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