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Engine-Codes – Ford – P0473 Ford

P0473 Ford Code - Exhaust Pressure Sensor High

Quick Answer

The P0473 code for Ford vehicles indicates an issue with the Exhaust Pressure Sensor, specifically that the sensor is reading a high voltage signal. Common causes include Faulty Sensor: The Exhaust Pressure Sensor itself may be malfunctioning and providing incorrect readings, Wiring Issues: Corrosion, breaks, or shorts in the wiring connected to the sensor can cause high voltage signals to be sent, Exhaust System Blockage: A blockage in the exhaust system can lead to increased pressure, triggering the 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
P0473 Ford indicates Exhaust Pressure Sensor High.
Common causes
Common causes include Faulty Sensor: The Exhaust Pressure Sensor itself may be malfunctioning and providing incorrect readings, Wiring Issues: Corrosion, breaks, or shorts in the wiring connected to the sensor can cause high voltage signals to be sent, Exhaust System Blockage: A blockage in the exhaust system can lead to increased pressure, triggering the 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.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P0473 Ford Description

The P0473 code for Ford vehicles indicates an issue with the Exhaust Pressure Sensor, specifically that the sensor is reading a high voltage signal. This sensor is responsible for monitoring the pressure in the exhaust system and ensuring that it is within the correct parameters for optimal engine performance. When the sensor detects a high voltage signal, it can lead to improper fuel-air mixtures, reduced fuel efficiency, and potentially even engine damage if not addressed promptly.

OBDII Code P0473 Ford - Exhaust Pressure Sensor High
P0473 Ford Code - Exhaust Pressure Sensor High

Common Causes of P0473 Ford

  1. Faulty Sensor: The Exhaust Pressure Sensor itself may be malfunctioning and providing incorrect readings.
  2. Wiring Issues: Corrosion, breaks, or shorts in the wiring connected to the sensor can cause high voltage signals to be sent.
  3. Exhaust System Blockage: A blockage in the exhaust system can lead to increased pressure, triggering the sensor.
  4. Software or Calibration Errors: Issues with the vehicle's engine control module (ECM) or software can also cause erroneous sensor readings.

Symptoms of P0473 Ford

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to the incorrect pressure readings from the sensor.
  3. Poor Fuel Efficiency: A faulty Exhaust Pressure Sensor can cause the engine to run less efficiently, leading to decreased fuel mileage.
  4. Increased Emissions: High exhaust pressure can result in higher emissions output, potentially causing the vehicle to fail emissions testing.

How to Fix P0473 Ford

  1. Diagnose the Issue: Use a diagnostic scanner to confirm the P0473 code and pinpoint the exact cause of the high exhaust pressure reading.
  2. Inspect Sensor and Wiring: Check the Exhaust Pressure Sensor and its wiring for any visible damage or corrosion.
  3. Clear Codes: After identifying and fixing the issue, clear the diagnostic trouble codes from the vehicle's ECM.
  4. Test Drive: Take the vehicle for a test drive to ensure that the repair has resolved the high exhaust pressure and that the check engine light does not reappear.
  5. Replace Sensor or Wiring: If the sensor or wiring is found to be faulty, replace the defective components to ensure proper functionality.

Cost to Fix P0473 Ford

The typical repair costs for resolving a P0473 code in a Ford vehicle can range from $100 to $300, depending on the specific cause of the issue and the price of parts and labor in your area. It is recommended to consult with a trusted mechanic or auto repair shop to obtain an accurate estimate based on your vehicle's make and model. Keep in mind that diagnostic time and labor rates can vary, so it's advisable to inquire about these details before proceeding with the repair.

What does this mean?

Tech Notes for P0473 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.

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