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Engine-Codes – Ford – P0471 Ford

P0471 Ford Code - Exhaust Pressure Sensor Range/Performance

Quick Answer

The P0471 Ford code indicates a problem with the exhaust pressure sensor in the vehicle. Common causes include Faulty exhaust pressure sensor, Wiring or connector issues in the sensor circuit, Exhaust system leaks. 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
P0471 Ford indicates Exhaust Pressure Sensor Range/Performance.
Common causes
Common causes include Faulty exhaust pressure sensor, Wiring or connector issues in the sensor circuit, Exhaust system leaks.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P0471 Ford Description

The P0471 Ford code indicates a problem with the exhaust pressure sensor in the vehicle. This sensor is responsible for monitoring the exhaust pressure and sending this data to the engine control module (ECM) to ensure optimal performance and emissions control. When the sensor detects that the exhaust pressure is outside of the expected range or if there is a performance issue, it will trigger this diagnostic trouble code (DTC).

OBDII Code P0471 Ford - Exhaust Pressure Sensor Range/Performance
P0471 Ford Code - Exhaust Pressure Sensor Range/Performance

Common Causes of P0471 Ford

  1. Faulty exhaust pressure sensor
  2. Wiring or connector issues in the sensor circuit
  3. Exhaust system leaks
  4. Exhaust back pressure sensor malfunction
  5. ECM software or hardware issues

Symptoms of P0471 Ford

  1. Reduced engine power
  2. Poor fuel economy
  3. Check Engine Light illuminated
  4. Increased emissions
  5. Rough idling or stalling

How to Fix P0471 Ford

  1. Diagnose the issue by using a scan tool to read the DTC and inspecting the sensor and related components.
  2. Test the exhaust pressure sensor using a digital multimeter to check for proper voltage and resistance.
  3. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  4. Check for exhaust leaks and repair them to ensure accurate pressure readings.
  5. If the sensor is faulty, replace it with a new one and reset the DTC using a scan tool.

Cost to Fix P0471 Ford

The cost estimate for repairing the P0471 Ford code can vary depending on the specific vehicle make and model, as well as the location and labor rates of the auto repair shop. In general, the cost of replacing an exhaust pressure sensor can range from $150 to $300, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It is recommended to consult with a qualified mechanic or repair shop to get an accurate estimate for this repair.

What does this mean?

Tech Notes for P0471 Ford

Replacing the exhaust back pressure usually takes care of the problem

When is the Code Detected?

An Exhaust Back Pressure (EBP) signal that is detected out of range (high or low) by the Engine Control Module (ECM) will cause the engine to ignore the EBP signal and disable exhaust back pressure operation.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0471 Ford Code

1. What are the common symptoms of OBDII code P0471 in a Ford vehicle?

The common symptoms of OBDII code P0471 in a Ford vehicle include reduced engine power, poor fuel efficiency, and possible illumination of the Check Engine Light.

2. What can cause the OBDII code P0471 to appear in a Ford vehicle?

The OBDII code P0471 in a Ford vehicle is typically triggered by a faulty exhaust pressure sensor, damaged wiring or connectors, or a problem with the exhaust system itself.

3. How serious is the OBDII code P0471 in a Ford vehicle?

While the OBDII code P0471 may not cause immediate engine failure, it is important to address the issue promptly to prevent potential long-term damage to the engine or exhaust system.

4. How can I diagnose the OBDII code P0471 in my Ford vehicle?

Diagnosing the OBDII code P0471 involves using a diagnostic scanner to read the code, checking the exhaust pressure sensor and related components for damage, and inspecting the wiring for any issues.

5. Can I drive my Ford vehicle with the OBDII code P0471?

It is not recommended to drive your Ford vehicle with the OBDII code P0471, as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I repair the OBDII code P0471 in my Ford vehicle?

Repairing the OBDII code P0471 typically involves replacing the faulty exhaust pressure sensor, repairing any damaged wiring or connectors, and clearing the code with a diagnostic scanner.

7. Are there any DIY tips for fixing the OBDII code P0471 in a Ford vehicle?

While some DIY enthusiasts may attempt to replace the exhaust pressure sensor themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair of the issue.

8. How much does it cost to fix the OBDII code P0471 in a Ford vehicle?

The cost of fixing the OBDII code P0471 in a Ford vehicle can vary depending on the root cause of the issue, but it typically ranges from $100 to $300 for parts and labor.

9. Can a dirty air filter trigger the OBDII code P0471 in a Ford vehicle?

A dirty air filter is unlikely to trigger the OBDII code P0471 directly, but it can contribute to poor engine performance and potentially worsen the effects of the underlying issue causing the code.

10. Is it necessary to reset the ECU after repairing the OBDII code P0471 in a Ford vehicle?

It is recommended to reset the ECU (Engine Control Unit) after repairing the OBDII code P0471 in a Ford vehicle to clear the code from the system and ensure proper operation of the engine.

Discuss the causes and fixes for P0471 Ford OBDII Code

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  • 2012 f-450 cranks but wont start. P0471 active. Replaced EP sensor. Same code active checked barometric pressure vs exhaust pressure and compared to another truck in my fleet. Readings are the same but no code for the known good vehicle.

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