P0402 Lincoln Code - Exhaust Gas Recirculation Flow Excessive Detected
Quick Answer
The P0402 diagnostic trouble code (DTC) for Lincoln vehicles indicates that there is an excessive flow of exhaust gas recirculation (EGR) detected. Common causes include Malfunctioning EGR valve, Clogged EGR passages, Faulty EGR 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
- P0402 Lincoln indicates Exhaust Gas Recirculation Flow Excessive Detected.
- Common causes
- Common causes include Malfunctioning EGR valve, Clogged EGR passages, Faulty EGR 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.
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Code P0402 Lincoln Description
The P0402 diagnostic trouble code (DTC) for Lincoln vehicles indicates that there is an excessive flow of exhaust gas recirculation (EGR) detected. The EGR system plays a crucial role in reducing harmful emissions by recirculating a portion of the exhaust gases back into the combustion chamber to be re-burned. When the EGR flow is excessive, it can lead to a variety of issues that negatively impact the vehicle's performance and emissions levels.
Common Causes of P0402 Lincoln
- Malfunctioning EGR valve
- Clogged EGR passages
- Faulty EGR sensor
- Issues with the EGR vacuum solenoid
- Carbon buildup in the EGR system
Symptoms of P0402 Lincoln
- Reduced engine power
- Poor fuel efficiency
- Rough idling or engine misfires
- Engine stalling
- Increased emissions levels
How to Fix P0402 Lincoln
- Diagnose the issue by using a scan tool to verify the P0402 code and inspecting the EGR components for any visible damage or clogs.
- Clean or replace the EGR valve, as it is often the culprit behind excessive EGR flow.
- Check and clean the EGR passages to ensure that there are no obstructions preventing proper flow.
- Test the EGR sensor and vacuum solenoid to determine if they are functioning correctly and replace if necessary.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved and that the code does not reappear.
Cost to Fix P0402 Lincoln
The typical repair costs for addressing a P0402 code on a Lincoln vehicle can range from $200 to $500, depending on the specific components that need to be replaced or repaired. This estimate includes parts and labor but does not account for diagnostic time, which can vary depending on the shop's rates. It's advisable to consult with a trusted mechanic or auto repair shop to get a more accurate estimate based on your vehicle's make and model.
Tech Notes for P0402 Lincoln
2001 Lincoln Town Car
2002 Lincoln Town Car
2001-2002 Lincoln Town Car Factory Service Bulletin OBDII Code P0402 Code
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