Engine-CodesLincoln – P1408 Lincoln

P1408 Lincoln Code - EGR Flow Out Of Self-Test Range

Quick Answer

The P1408 diagnostic trouble code (DTC) for Lincoln vehicles indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. Common causes include Clogged EGR passages, Malfunctioning EGR valve, Faulty EGR position sensor. 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
P1408 Lincoln indicates EGR Flow Out Of Self-Test Range.
Common causes
Common causes include Clogged EGR passages, Malfunctioning EGR valve, Faulty EGR position sensor.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1408 Lincoln Description

The P1408 diagnostic trouble code (DTC) for Lincoln vehicles indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. Specifically, the code signifies that the EGR flow is out of the self-test range, meaning that the exhaust gas recirculation is not functioning within the expected parameters set by the vehicle's onboard computer system.

OBDII Code P1408 Lincoln - EGR Flow Out Of Self-Test Range
P1408 Lincoln Code - EGR Flow Out Of Self-Test Range

Common Causes of P1408 Lincoln

  1. Clogged EGR passages
  2. Malfunctioning EGR valve
  3. Faulty EGR position sensor
  4. Vacuum leaks in the EGR system
  5. Electrical issues related to the EGR system components

Symptoms of P1408 Lincoln

  1. Reduced engine power
  2. Hesitation or stumbling during acceleration
  3. Rough idling
  4. Increased emissions
  5. Engine stalling

How to Fix P1408 Lincoln

  1. Begin by performing a visual inspection of the EGR system components, checking for any visible signs of damage or leaks.
  2. Use a diagnostic scan tool to retrieve the specific trouble codes and data related to the EGR system.
  3. Test the EGR valve and position sensor for proper operation using a multimeter or other appropriate testing equipment.
  4. Inspect and clean the EGR passages to ensure there are no obstructions hindering the flow of exhaust gases.
  5. Replace any faulty EGR components such as the valve, position sensor, or related electrical connections as needed to restore proper EGR flow.

Cost to Fix P1408 Lincoln

The cost of repairing a P1408 code on a Lincoln vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the typical repair costs for addressing EGR system-related problems can range from $200 to $600, including parts and labor. It's important to note that the actual costs may differ based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Additionally, diagnostic time and labor rates at auto repair shops can vary widely, with hourly rates typically falling between $80 and $150. It's recommended to consult with a professional mechanic or shop to get an accurate estimate for addressing the P1408 code on a Lincoln vehicle.

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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.

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