P0473 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 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 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?
- 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?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0473 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 code?
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Information for Specific Makes
- P0473 Audi — Exhaust Pressure Sensor High
- P0473 Dodge — Exhaust Pressure Sensor High
- P0473 Ford — Exhaust Pressure Sensor High
- P0473 Mercedes-Benz — Exhaust Pressure Sensor High
- P0473 Volkswagen — Exhaust Pressure Sensor High
Frequently Asked Questions about P0473 Code
1. What are the common symptoms of OBDII code P0473 (Exhaust Pressure Sensor High)?
- Common symptoms include decreased engine performance, rough idling, decreased fuel efficiency, and potential black smoke from the exhaust.
2. What are the possible causes of OBDII code P0473?
- The code P0473 can be triggered by a faulty exhaust pressure sensor, wiring issues in the sensor circuit, or a problem with the exhaust system itself.
3. How can I diagnose the cause of OBDII code P0473?
- Diagnosing the cause of P0473 usually involves checking the exhaust pressure sensor for proper operation, inspecting the sensor wiring for damage, and ensuring there are no leaks or blockages in the exhaust system.
4. Can a high exhaust pressure sensor cause engine damage?
- A faulty exhaust pressure sensor may not directly cause engine damage, but it can lead to poor engine performance and decreased fuel efficiency if left unresolved.
5. How can I repair OBDII code P0473?
- Repairing P0473 typically involves replacing the faulty exhaust pressure sensor, repairing any damaged wiring in the sensor circuit, or addressing any issues in the exhaust system causing high pressure readings.
6. Is it safe to continue driving with OBDII code P0473 active?
- It is not recommended to continue driving with an active P0473 code as it can lead to poor engine performance and potential damage if left unresolved.
7. Can I reset OBDII code P0473 without fixing the underlying issue?
- While you can clear the code temporarily, it will likely reappear if the underlying issue causing the high exhaust pressure sensor reading is not addressed.
8. How much does it typically cost to repair OBDII code P0473?
- The cost of repairing P0473 can vary depending on the cause of the issue, but it may involve sensor replacement, wiring repairs, or exhaust system repairs, potentially ranging from $100 to $500 or more.
9. Are there any DIY methods to troubleshoot OBDII code P0473?
- DIY methods for troubleshooting P0473 may include visually inspecting the sensor and wiring, checking for exhaust system leaks, and using an OBDII scanner to monitor sensor readings.
10. Will OBDII code P0473 cause my vehicle to fail an emissions test?
- Yes, OBDII code P0473 can cause your vehicle to fail an emissions test due to the impact on engine performance and emissions control systems.
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