P0403 Lincoln Code - Exhaust Gas Recirculation Control Circuit
Quick Answer
Early Exhaust Gas Recirculation (EGR) systems components include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. Common causes include Faulty EGR volume control solenoid valve, EGR volume control solenoid valve harness is open or shorted, EGR volume control solenoid valve circuit poor electrical connection. 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
- P0403 Lincoln indicates Exhaust Gas Recirculation Control Circuit .
- Common causes
- Common causes include Faulty EGR volume control solenoid valve, EGR volume control solenoid valve harness is open or shorted, EGR volume control solenoid valve circuit poor electrical connection.
- 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 P0403 Lincoln Description
The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from the exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECΜ. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECΜ does not issue the pulse signal. Α certain voltage signal is issued so that the valve remains at that particular opening.
What are the Possible Causes of the DTC P0403 Lincoln?
- Faulty EGR volume control solenoid valve
- EGR volume control solenoid valve harness is open or shorted
- EGR volume control solenoid valve circuit poor electrical connection
- EGR temperature sensor and circuit
How to Fix the DTC P0403 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 P0403 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 P0403 Lincoln Code
1. What are the common symptoms of OBDII code P0403 in a Lincoln related to the Exhaust Gas Recirculation (EGR) Control Circuit?
- Common symptoms include rough idling, decreased fuel efficiency, engine hesitation, and the illumination of the check engine light.
2. What are some possible causes of OBDII code P0403 in a Lincoln?
- Possible causes include a faulty EGR valve, clogged EGR passages, wiring issues in the EGR circuit, or a malfunctioning EGR position sensor.
3. How can I diagnose the OBDII code P0403 in a Lincoln related to the EGR Control Circuit?
- Diagnosis typically involves using a scan tool to retrieve the code, checking the EGR valve and related components for proper operation, and testing the wiring and connectors in the EGR circuit.
4. Can I continue driving my Lincoln with OBDII code P0403 present?
- It is generally not recommended to continue driving with this code present, as it can lead to further engine damage and reduced performance if left unresolved.
5. What are some repair tips for fixing OBDII code P0403 in a Lincoln?
- Repair tips include cleaning or replacing the EGR valve, clearing any obstructions in the EGR passages, checking and repairing any damaged wiring, and ensuring proper EGR system operation.
6. How much does it typically cost to repair OBDII code P0403 in a Lincoln?
- The cost of repair can vary depending on the specific issue causing the code, but it may range from $100 to $500 or more, including parts and labor.
7. Can I reset the OBDII code P0403 in a Lincoln by disconnecting the battery?
- Disconnecting the battery may temporarily clear the code, but it is not a recommended long-term solution. The underlying issue causing the code should be diagnosed and repaired to prevent it from reoccurring.
8. Is it possible to prevent OBDII code P0403 from occurring in a Lincoln?
- Regular maintenance of the EGR system, including cleaning and inspection, can help prevent issues that may trigger this code. Additionally, using quality fuel and following recommended service intervals can also help prevent EGR-related problems.
9. Will OBDII code P0403 cause my Lincoln to fail an emissions test?
- Yes, this code is related to emissions control, and if present during an emissions test, it may cause your Lincoln to fail. It is important to address and repair the issue before seeking an emissions test.
10. How long does it typically take to repair OBDII code P0403 in a Lincoln?
- The repair time can vary depending on the specific cause of the code and the availability of parts. In general, the repair may take a few hours to a full day to complete.
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