AutoCodes – Audi – P0473 Audi

P0473 Audi Code - Exhaust Pressure Sensor High

Quick Answer

The Exhaust Back Pressure (EBP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from the Engine Control Module (ECM), produces a linear analog voltage signal that indicates pressure. Common causes include Faulty Exhaust Back Pressure Sensor, Exhaust Back Pressure Sensor harness is open or shorted, Exhaust Back Pressure Sensor circuit poor electrical connection. 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 Audi indicates Exhaust Pressure Sensor High.
Common causes: Common causes include Faulty Exhaust Back Pressure Sensor, Exhaust Back Pressure Sensor harness is open or shorted, Exhaust Back Pressure Sensor circuit poor electrical connection.
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 Popularity 4,980

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 23, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0473 Audi Description

The Exhaust Back Pressure (EBP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from the Engine Control Module (ECM), produces a linear analog voltage signal that indicates pressure.
The EBP sensor's primary function is to measure exhaust back pressure so that the ECM can control the exhaust back pressure regulator (EPR) when needed.

OBDII Code P0473 Audi - Exhaust Pressure Sensor High - AutoCodes.com — P0473 Audi Code - Exhaust Pressure Sensor High

What does this mean?

What are the Possible Causes of the DTC P0473 Audi?

Faulty Exhaust Back Pressure Sensor
Exhaust Back Pressure Sensor harness is open or shorted
Exhaust Back Pressure Sensor circuit poor electrical connection

How to Fix the DTC P0473 Audi?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Replacing the exhaust back pressure usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0473 Audi code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0473 Audi code?

Need more information on how to fix the P0473 Audi code? Get Access to Factory Service Manuals

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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 P0473 Audi Code

1. What are the common symptoms of OBDII code P0473 in an Audi related to the Exhaust Pressure Sensor High?

- Common symptoms include reduced engine power, poor fuel efficiency, and potentially a Check Engine light illuminated on the dashboard.

2. What are the possible causes of OBDII code P0473 in an Audi?

- The code P0473 in an Audi is often triggered by a faulty exhaust pressure sensor, wiring issues, or a problem with the diesel particulate filter.

3. How can I diagnose the OBDII code P0473 in my Audi?

- Diagnosis involves using a scan tool to read the code, inspecting the exhaust pressure sensor and related wiring for any visible damage, and testing the sensor's functionality.

4. Can I drive my Audi with the OBDII code P0473 present?

- It is not recommended to drive with the code P0473 active, as it can lead to further damage to the engine or emissions system. It is best to address the issue promptly.

5. How can I repair OBDII code P0473 in my Audi?

- Repair typically involves replacing the faulty exhaust pressure sensor, repairing any damaged wiring, and ensuring proper functioning of the diesel particulate filter system.

6. Is it possible to clear the OBDII code P0473 in my Audi without fixing the issue?

- Clearing the code without addressing the underlying problem is not recommended, as the issue will likely reoccur and could lead to more severe complications.

7. Are there any preventive maintenance tips to avoid OBDII code P0473 in my Audi?

- Regularly servicing the exhaust system, including the pressure sensor and diesel particulate filter, can help prevent issues that may trigger code P0473.

8. How much does it cost to repair OBDII code P0473 in an Audi?

- The cost of repair can vary depending on the extent of the issue and whether you choose to address it yourself or take it to a professional mechanic. It is advisable to get a quote for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P0473 in an Audi?

- Depending on your skill level and access to tools, you may be able to replace the exhaust pressure sensor or repair wiring yourself. However, complex issues may require professional assistance.

10. Will OBDII code P0473 cause my Audi to fail an emissions test?

- Yes, the presence of code P0473 may cause your Audi to fail an emissions test, as it indicates a problem with the exhaust pressure sensor or emissions system.