P1408 Mercury Code - EGR Flow Out Of Self-Test Range
Quick Answer
The P1408 diagnostic trouble code (DTC) for Mercury vehicles indicates that the Exhaust Gas Recirculation (EGR) flow is out of the self-test range. Common causes include Clogged EGR valve, Faulty EGR position sensor, Vacuum leak in the EGR system. 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 Mercury indicates EGR Flow Out Of Self-Test Range.
- Common causes
- Common causes include Clogged EGR valve, Faulty EGR position sensor, Vacuum leak in the EGR system.
- 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 P1408 Mercury Description
The P1408 diagnostic trouble code (DTC) for Mercury vehicles indicates that the Exhaust Gas Recirculation (EGR) flow is out of the self-test range. The EGR system is responsible for recirculating a portion of the exhaust gases back into the intake manifold to reduce harmful emissions and control combustion temperatures. When the EGR flow is out of the self-test range, it means that the ECU (Engine Control Unit) has detected a deviation from the expected flow rate during the self-test procedure.
Common Causes of P1408 Mercury
- Clogged EGR valve
- Faulty EGR position sensor
- Vacuum leak in the EGR system
- Malfunctioning EGR control solenoid
- Carbon buildup in the EGR system
Symptoms of P1408 Mercury
- Decreased fuel efficiency
- Rough idling or stalling
- Engine hesitation or lack of power
- Engine misfires
- Check Engine Light illuminated
How to Fix P1408 Mercury
- Diagnose the issue using a scan tool to confirm the P1408 code and identify the specific component causing the problem.
- Inspect the EGR valve for clogging or carbon buildup and clean or replace it if necessary.
- Check the EGR position sensor and EGR control solenoid for proper operation and replace them if faulty.
- Inspect the vacuum lines connected to the EGR system for leaks and repair or replace any damaged lines.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P1408 Mercury
The cost of repairing a P1408 code on a Mercury vehicle can vary depending on the specific cause of the issue and the labor rates in your area. In general, the parts required for the repair (such as an EGR valve, EGR position sensor, or EGR control solenoid) can range from $50 to $200 each. Labor costs typically range from $100 to $300, depending on the shop's hourly rate and the complexity of the repair.
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