P0473 Mercedes-Benz 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 Mercedes-Benz 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.
Code P0473 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 P0473 Mercedes-Benz?
- 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 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 P0473 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 P0473 Mercedes-Benz code?
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Frequently Asked Questions about P0473 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0473 on a Mercedes-Benz related to the Exhaust Pressure Sensor High?
The common symptoms include decreased engine performance, reduced fuel efficiency, and potentially an illuminated Check Engine Light.
2. What are the possible causes of OBDII code P0473 on a Mercedes-Benz?
The code P0473 on a Mercedes-Benz typically indicates a fault with the exhaust pressure sensor, a wiring issue, or a problem with the sensor's circuit.
3. How can I diagnose the cause of OBDII code P0473 on my Mercedes-Benz?
To diagnose the cause of code P0473, it is recommended to perform a thorough inspection of the exhaust pressure sensor, check the wiring for any damage or loose connections, and use a diagnostic scanner to read the sensor's data.
4. Can I drive my Mercedes-Benz with OBDII code P0473 present?
It is not recommended to drive your Mercedes-Benz with OBDII code P0473 present, as it can lead to further damage to the engine or emissions system. It is best to address the issue promptly.
5. How do I repair OBDII code P0473 on my Mercedes-Benz?
Repairing OBDII code P0473 on a Mercedes-Benz often involves replacing the faulty exhaust pressure sensor, repairing any damaged wiring or connections, and clearing the trouble code with a diagnostic scanner.
6. Are there any DIY tips for troubleshooting OBDII code P0473 on a Mercedes-Benz?
While diagnosing and repairing OBDII code P0473 may require specialized tools and knowledge, you can start by checking the sensor's connections, inspecting the wiring for any visible issues, and ensuring the sensor is clean and free of debris.
7. Is it necessary to reset the ECU after repairing OBDII code P0473 on a Mercedes-Benz?
Yes, it is recommended to reset the ECU after repairing OBDII code P0473 on a Mercedes-Benz. This will clear the trouble code from the system and allow the vehicle to relearn any adjustments made during the repair process.
8. Can a faulty exhaust pressure sensor cause other issues in addition to triggering OBDII code P0473 on a Mercedes-Benz?
Yes, a faulty exhaust pressure sensor on a Mercedes-Benz can cause issues such as poor engine performance, increased emissions, and potential damage to other components if left unaddressed.
9. How much does it typically cost to repair OBDII code P0473 on a Mercedes-Benz at a dealership or repair shop?
The cost of repairing OBDII code P0473 on a Mercedes-Benz can vary depending on the extent of the issue, the labor rates of the shop, and the cost of parts. It is advisable to obtain quotes from different shops for comparison.
10. Can OBDII code P0473 on a Mercedes-Benz be prevented or avoided?
While some causes of OBDII code P0473 may be inevitable, regular maintenance, timely repairs, and addressing any related issues promptly can help prevent the recurrence of this code on your Mercedes-Benz.
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