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P1407 Lincoln Code - Exhaust Gas Recirculation Flow Out Of Self-Test Range

Quick Answer

The P1407 diagnostic trouble code (DTC) for Lincoln vehicles indicates that the Exhaust Gas Recirculation (EGR) flow is out of the self-test range. Common causes include Carbon buildup in the EGR system, Faulty EGR valve, Clogged EGR passage. 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
P1407 Lincoln indicates Exhaust Gas Recirculation Flow Out Of Self-Test Range.
Common causes
Common causes include Carbon buildup in the EGR system, Faulty EGR valve, Clogged EGR passage.
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 P1407 Lincoln Description

The P1407 diagnostic trouble code (DTC) for Lincoln vehicles indicates that the Exhaust Gas Recirculation (EGR) flow is out of the self-test range. The EGR system is responsible for recirculating a portion of the engine's exhaust gases back into the intake manifold to reduce combustion temperatures and lower harmful emissions. When the EGR flow is out of the self-test range, it means that the amount of exhaust gas being recirculated is not within the expected parameters as determined by the vehicle's computer system.

OBDII Code P1407 Lincoln - Exhaust Gas Recirculation Flow Out Of Self-Test Range
P1407 Lincoln Code - Exhaust Gas Recirculation Flow Out Of Self-Test Range

Common Causes of P1407 Lincoln

  1. Carbon buildup in the EGR system
  2. Faulty EGR valve
  3. Clogged EGR passage
  4. Malfunctioning EGR sensor
  5. Wiring or electrical issues in the EGR system

Symptoms of P1407 Lincoln

  1. Engine hesitation or stumbling during acceleration
  2. Rough idling or stalling
  3. Decreased fuel economy
  4. Check Engine Light illuminated
  5. Failed emissions test

How to Fix P1407 Lincoln

  1. Begin by diagnosing the specific cause of the P1407 code using a diagnostic scanner and following the manufacturer's repair manual.
  2. Inspect and clean the EGR valve, passages, and sensor to remove any carbon buildup or debris.
  3. Test the EGR system components, such as the valve and sensor, for proper operation and replace any faulty parts.
  4. Check the wiring and connectors in the EGR system for any damage or corrosion and repair as necessary.
  5. Clear the DTC and reset the vehicle's computer system to see if the issue has been resolved.

Cost to Fix P1407 Lincoln

The typical repair costs for addressing a P1407 code can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more affordable prices.

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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 P1407 Lincoln Code

1. What are the common symptoms of OBDII code P1407 in a Lincoln vehicle?

The common symptoms of OBDII code P1407 in a Lincoln include rough idling, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P1407 in a Lincoln?

Possible causes of OBDII code P1407 in a Lincoln include a faulty EGR valve, clogged EGR passages, vacuum leaks, or a malfunctioning EGR position sensor.

3. How does a clogged EGR valve contribute to the OBDII code P1407 in a Lincoln?

A clogged EGR valve can restrict the flow of exhaust gases, leading to improper EGR system operation and triggering the OBDII code P1407 in a Lincoln.

4. What is the significance of the EGR system in a Lincoln vehicle?

The Exhaust Gas Recirculation (EGR) system in a Lincoln vehicle helps reduce emissions by recirculating a portion of the exhaust gases back into the engine to lower combustion temperatures and reduce the formation of harmful pollutants.

5. Can a DIY enthusiast repair OBDII code P1407 in a Lincoln?

Depending on the cause of the OBDII code P1407, a DIY enthusiast may be able to repair it by cleaning or replacing the EGR valve, checking for vacuum leaks, or inspecting the EGR passages for blockages.

6. How can a mechanic diagnose OBDII code P1407 in a Lincoln?

A mechanic can diagnose OBDII code P1407 in a Lincoln by using a scan tool to retrieve the code, conducting a visual inspection of the EGR system components, and performing tests to check the functionality of the EGR valve and related sensors.

7. Is it safe to continue driving a Lincoln with OBDII code P1407?

It is not recommended to continue driving a Lincoln with OBDII code P1407, as it can lead to poor engine performance, increased emissions, and potential damage to other engine components if left unresolved.

8. Are there any preventive measures to avoid OBDII code P1407 in a Lincoln?

Regular maintenance of the EGR system, including cleaning the EGR valve and passages, checking for vacuum leaks, and using high-quality fuel, can help prevent issues that may trigger OBDII code P1407 in a Lincoln.

9. What are the typical repair costs for addressing OBDII code P1407 in a Lincoln?

The repair costs for addressing OBDII code P1407 in a Lincoln can vary depending on the root cause, but it may range from $100 to $500, including parts and labor.

10. How long does it usually take to fix OBDII code P1407 in a Lincoln?

The time to fix OBDII code P1407 in a Lincoln can range from 1 to 3 hours, depending on the complexity of the issue and the specific repairs needed, such as cleaning, replacing parts, or conducting further diagnostics.

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