AutoCodes – Audi – P047A Audi

P047A Audi Code - Exhaust Pressure Sensor 'B' Circuit

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 'B', Exhaust Back Pressure Sensor 'B' harness is open or shorted, Exhaust Back Pressure Sensor 'B' circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P047A Audi indicates Exhaust Pressure Sensor 'B' Circuit.
Common causes: Common causes include Faulty Exhaust Back Pressure Sensor 'B', Exhaust Back Pressure Sensor 'B' harness is open or shorted, Exhaust Back Pressure Sensor 'B' circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,555

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 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
Cost to Diagnose
FAQs
Comments
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Code P047A 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 P047A Audi - Exhaust Pressure Sensor 'B' Circuit - AutoCodes.com — P047A Audi Code - Exhaust Pressure Sensor 'B' Circuit

What does this mean?

What are the Possible Causes of the DTC P047A Audi?

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

How to Fix the DTC P047A 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P047A 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.

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Need more information on how to fix the P047A 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 P047A Audi Code

1. What are the common symptoms of OBDII code P047A related to the Exhaust Pressure Sensor 'B' Circuit in an Audi?

The common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P047A in an Audi?

Possible causes include a faulty exhaust pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

3. How can I diagnose the Exhaust Pressure Sensor 'B' Circuit issue in my Audi?

Diagnosis involves using an OBDII scanner to retrieve the specific trouble code, conducting a visual inspection of the sensor and its connections, and testing the sensor's functionality using a multimeter.

4. Can I drive my Audi with OBDII code P047A present?

It is not recommended to drive your Audi with this code present, 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 P047A in my Audi?

Repairing the issue may involve replacing the exhaust pressure sensor, repairing damaged wiring or connectors, or reprogramming the engine control module as necessary.

6. Are there any DIY tips for addressing code P047A in an Audi?

While some basic inspection and testing can be done DIY, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

7. How much does it typically cost to repair OBDII code P047A in an Audi?

The cost of repair can vary depending on the specific cause of the issue, but it may range from $150 to $500 or more, including parts and labor.

8. Are there any preventive measures to avoid OBDII code P047A in the future?

Regular maintenance, such as checking the exhaust system components and sensors during scheduled services, can help prevent issues like OBDII code P047A in the future.

9. Can a faulty Exhaust Pressure Sensor 'B' Circuit affect the overall performance of an Audi?

Yes, a faulty sensor can lead to poor engine performance, reduced fuel efficiency, and potential damage to other components if left unaddressed.

10. Is it necessary to reset the check engine light after repairing OBDII code P047A in an Audi?

Yes, it is recommended to reset the check engine light using an OBDII scanner after repairing the issue to ensure that the system recognizes the problem has been resolved.