P1407 Lincoln Code - Exhaust Gas Recirculation Flow Out Of Self-Test Range
Quick Answer
The Exhaust Gas Recirculation (EGR) system recirculates a portion of the exhaust gasses into the intake manifold under average vehicle driving conditions to reduce combustion temperatures and exhaust gas NOx content. Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation (EGR) Valve Vacuum hose off or defective, Plugged Exhaust Gas Recirculation (EGR) Valve. 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 Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation (EGR) Valve Vacuum hose off or defective, Plugged Exhaust Gas Recirculation (EGR) Valve.
- 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.
Code P1407 Lincoln Description
This test is performed during the Key On Engine Running (KOER) on demand self-test only. The EGR system is commanded ON at a fixed engine speed. The test fails and the Diagnostic Trouble Code (DTC) is output when the measured EGR flow falls above or below the required calibration.
What are the Possible Causes of the DTC P1407 Lincoln?
- Faulty Exhaust Gas Recirculation (EGR) Valve
- Exhaust Gas Recirculation (EGR) Valve Vacuum hose off or defective
- Plugged Exhaust Gas Recirculation (EGR) Valve
How to Fix the DTC P1407 Lincoln?
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 P1407 Lincoln 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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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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