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P1402 Lincoln Code - EGR Metering Orifice Restricted

Quick Answer

The P1402 diagnostic trouble code for Lincoln vehicles indicates that there is a restriction in the EGR (Exhaust Gas Recirculation) metering orifice. Common causes include Carbon buildup in the EGR system, Debris or foreign objects blocking the metering orifice, Poor maintenance practices. 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
P1402 Lincoln indicates EGR Metering Orifice Restricted.
Common causes
Common causes include Carbon buildup in the EGR system, Debris or foreign objects blocking the metering orifice, Poor maintenance practices.
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 29, 2024
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Code P1402 Lincoln Description

The P1402 diagnostic trouble code for Lincoln vehicles indicates that there is a restriction in the EGR (Exhaust Gas Recirculation) metering orifice. The EGR system is responsible for reducing nitrogen oxide emissions by recirculating a portion of the exhaust gases back into the engine's intake manifold. The metering orifice controls the flow rate of these gases, and if it becomes restricted, it can lead to various performance issues.

OBDII Code P1402 Lincoln - EGR Metering Orifice Restricted
P1402 Lincoln Code - EGR Metering Orifice Restricted

Common Causes of P1402 Lincoln

  1. Carbon buildup in the EGR system.
  2. Debris or foreign objects blocking the metering orifice.
  3. Poor maintenance practices.
  4. Low-quality fuel.
  5. Driving conditions that prevent the engine from reaching optimal operating temperatures.

Symptoms of P1402 Lincoln

  1. Check engine light illuminated on the dashboard.
  2. Decreased fuel efficiency.
  3. Rough idling or stalling.
  4. Reduced engine power.
  5. Increased emissions.

How to Fix P1402 Lincoln

  1. Diagnose the issue using a scan tool to confirm the P1402 code.
  2. Inspect the EGR system for carbon buildup or debris.
  3. Clean the EGR metering orifice and passages to remove any obstructions.
  4. Replace the EGR valve or metering orifice if cleaning does not resolve the issue.
  5. Clear the trouble code and test drive the vehicle to ensure the problem has been resolved.

Cost to Fix P1402 Lincoln

The typical repair costs for addressing a restricted EGR metering orifice can range from $150 to $400, depending on the extent of the issue and whether any parts need to be replaced. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also impact the final cost of the repair. It is advisable to consult with a trusted mechanic or repair shop to get an accurate estimate for this specific issue.

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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 P1402 Lincoln Code

1. What does the OBDII code P1402 mean on a Lincoln?

P1402 indicates that the EGR (Exhaust Gas Recirculation) metering orifice is restricted, preventing proper flow of exhaust gases into the intake system.

2. What are the symptoms of a P1402 code in a Lincoln?

Common symptoms include reduced engine performance, rough idling, increased emissions, and potentially an illuminated Check Engine Light.

3. What causes the P1402 code to appear?

The code is typically caused by carbon buildup in the EGR system, a clogged EGR metering orifice, a malfunctioning EGR valve, or faulty EGR sensors.

4. How is the P1402 code diagnosed?

A mechanic will inspect the EGR system for blockages, test the EGR valve function, and use a scan tool to monitor sensor data and confirm restricted flow.

5. Can I drive my Lincoln with the P1402 code?

Driving with this code is not recommended as it can lead to reduced fuel efficiency, higher emissions, and potential damage to the engine over time.

6. How can I fix the P1402 code on my Lincoln?

The fix may involve cleaning or replacing the EGR valve, clearing carbon deposits from the EGR passages, or replacing faulty sensors.

7. How much does it cost to repair a P1402 code?

Repair costs vary but typically range from $150 to $400, depending on whether the EGR valve needs cleaning or replacement.

8. Can a clogged EGR metering orifice cause other engine issues?

Yes, a clogged orifice can cause poor combustion, reduced power, and increased engine temperatures, potentially leading to further damage.

9. How can I prevent the P1402 code from recurring?

Regular maintenance, including periodic cleaning of the EGR system and using quality fuel, can help prevent carbon buildup and blockages.

10. Does the P1402 code always point to the EGR system?

While it usually indicates an EGR issue, faulty wiring, connectors, or unrelated engine problems can occasionally trigger this code.

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