P047E Mercedes-Benz Code - Exhaust Pressure Sensor 'B' Circuit Intermittent/Erratic
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
- P047E Mercedes-Benz indicates Exhaust Pressure Sensor 'B' Circuit Intermittent/Erratic.
- 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 P047E 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 P047E 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 P047E 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 P047E 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 P047E Mercedes-Benz code?
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Frequently Asked Questions about P047E Mercedes-Benz Code
1. What are common symptoms of OBDII code P047E in a Mercedes-Benz?
- Common symptoms may include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine light.
2. What does the OBDII code P047E for a Mercedes-Benz indicate?
- This code indicates a problem with the Exhaust Pressure Sensor 'B' circuit, specifically an intermittent or erratic signal.
3. What are possible causes of the Exhaust Pressure Sensor 'B' circuit intermittent/erratic issue in a Mercedes-Benz?
- Possible causes include a faulty exhaust pressure sensor, damaged wiring or connectors, a clogged DPF (diesel particulate filter), or a malfunctioning ECM (engine control module).
4. Can driving with OBDII code P047E in a Mercedes-Benz cause further damage?
- Continuing to drive with this code may lead to reduced engine efficiency, potential damage to the emissions system, and ultimately more costly repairs.
5. How can I diagnose the cause of OBDII code P047E in my Mercedes-Benz?
- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the exhaust pressure sensor and its wiring for damage, and testing the sensor's functionality.
6. Is it safe to drive my Mercedes-Benz with the Check Engine light on due to code P047E?
- It is generally not recommended to drive with the Check Engine light on, as it indicates a potential issue that could affect the vehicle's performance and emissions.
7. Can I reset the OBDII code P047E in my Mercedes-Benz to see if it returns?
- While you can clear the code using a diagnostic scanner, it is advised to diagnose and repair the underlying issue first before clearing the code to see if it reoccurs.
8. How much does it cost to repair OBDII code P047E in a Mercedes-Benz?
- Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to a few thousand dollars, including parts and labor.
9. Are there any DIY repair tips for addressing OBDII code P047E in a Mercedes-Benz?
- DIY tips may include checking and cleaning the exhaust pressure sensor, inspecting and repairing damaged wiring, and ensuring proper connections before considering professional help.
10. Can a Mercedes-Benz dealership or certified mechanic help diagnose and repair OBDII code P047E?
- Yes, taking your vehicle to a dealership or certified mechanic with experience in Mercedes-Benz vehicles is recommended for accurate diagnosis and repair of this code.
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