P047D Mercedes-Benz Code - Exhaust Pressure Sensor 'B' Circuit 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 '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
- P047D Mercedes-Benz indicates Exhaust Pressure Sensor 'B' Circuit High.
- 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.
Code P047D Mercedes-Benz Description
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.
What are the Possible Causes of the DTC P047D Mercedes-Benz?
- 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 P047D Mercedes-Benz?
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 P047D Mercedes-Benz 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 P047D Mercedes-Benz code?
Need more information on how to fix the P047D Mercedes-Benz code? Get Access to Factory Service Manuals
Need Help with the Code?
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Frequently Asked Questions about P047D Mercedes-Benz Code
1. What are the common symptoms of OBDII code P047D in a Mercedes-Benz?
The common symptoms of code P047D include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.
2. What does the OBDII code P047D indicate in a Mercedes-Benz?
Code P047D indicates a high circuit voltage in the exhaust pressure sensor 'B' in a Mercedes-Benz, signaling a potential issue with the sensor or its circuit.
3. What are the possible causes of OBDII code P047D in a Mercedes-Benz?
Possible causes of code P047D in a Mercedes-Benz include a faulty exhaust pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.
4. How can I diagnose the OBDII code P047D in my Mercedes-Benz?
Diagnosing code P047D involves using an OBDII scanner to retrieve the code, inspecting the exhaust pressure sensor and its wiring for any visible damage, and testing the sensor's voltage and resistance.
5. Can I continue driving my Mercedes-Benz with OBDII code P047D?
It is not recommended to continue driving your Mercedes-Benz with code P047D, as it can lead to further engine damage and worsen fuel efficiency. It is best to address the issue promptly.
6. How can I repair OBDII code P047D in my Mercedes-Benz?
Repairing code P047D may involve replacing the faulty exhaust pressure sensor, repairing or replacing damaged wiring or connectors, or reprogramming the engine control module to address the high circuit voltage issue.
7. Is it possible to reset OBDII code P047D in a Mercedes-Benz without fixing the underlying issue?
While you can clear the code temporarily, the check engine light will likely reappear if the underlying issue causing code P047D is not addressed. It is recommended to diagnose and repair the problem to prevent further issues.
8. Can a DIY enthusiast fix OBDII code P047D in a Mercedes-Benz?
Depending on the DIY enthusiast's skill level and access to tools, it may be possible to fix code P047D by replacing the exhaust pressure sensor or repairing damaged wiring. However, complex diagnostics may require professional assistance.
9. Will OBDII code P047D cause my Mercedes-Benz to fail an emissions test?
Code P047D may cause your Mercedes-Benz to fail an emissions test due to increased emissions resulting from poor engine performance. It is essential to address the issue to ensure your vehicle meets emissions standards.
10. How much can I expect to pay for repairing OBDII code P047D in a Mercedes-Benz?
The cost of repairing code P047D in a Mercedes-Benz can vary depending on the cause of the issue, parts needed for repair, and labor costs. It is recommended to consult a mechanic for an accurate estimate.
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