P1406 Lincoln Code - DPFE Sensor Circuit Downstream Hose
Quick Answer
The P1406 diagnostic trouble code (DTC) in a Lincoln vehicle indicates a problem with the Differential Pressure Feedback Exhaust (DPFE) sensor circuit downstream hose. Common causes include Damaged or corroded downstream hose, Faulty DPFE sensor, Wiring issue in the sensor circuit. 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
- P1406 Lincoln indicates DPFE Sensor Circuit Downstream Hose.
- Common causes
- Common causes include Damaged or corroded downstream hose, Faulty DPFE sensor, Wiring issue in the sensor circuit.
- 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 P1406 Lincoln Description
The P1406 diagnostic trouble code (DTC) in a Lincoln vehicle indicates a problem with the Differential Pressure Feedback Exhaust (DPFE) sensor circuit downstream hose. The DPFE sensor is a crucial component of the vehicle's emissions control system, responsible for monitoring the exhaust gas recirculation (EGR) system's function. The downstream hose connects the DPFE sensor to the EGR valve, allowing it to measure the pressure difference between the exhaust gases in the EGR system.
Common Causes of P1406 Lincoln
- Damaged or corroded downstream hose
- Faulty DPFE sensor
- Wiring issue in the sensor circuit
- Problem with the EGR valve
Symptoms of P1406 Lincoln
- Decreased fuel efficiency
- Increased emissions
- Rough idling
- Hesitation during acceleration
- Engine misfires
How to Fix P1406 Lincoln
- Diagnose the issue by using a scan tool to retrieve the specific DTC and inspecting the DPFE sensor, downstream hose, and related wiring for any visible damage.
- Replace the downstream hose if it is damaged or corroded, ensuring a proper seal between the DPFE sensor and the EGR valve.
- Test the DPFE sensor using a multimeter to check for proper voltage and resistance values, replacing it if necessary.
- Inspect the wiring in the sensor circuit for any breaks or damage, repairing or replacing as needed.
- Verify the repair by clearing the DTC and performing a test drive to ensure the issue has been resolved.
Cost to Fix P1406 Lincoln
The typical repair costs for addressing a P1406 code in a Lincoln vehicle can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It's recommended to check with local repair shops for a more accurate estimate based on your specific vehicle and location.
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