Exhaust Pressure Sensor High
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
P0473 AUDI Possible Causes
- Faulty Exhaust Back Pressure Sensor
- Exhaust Back Pressure Sensor harness is open or shorted
- Exhaust Back Pressure Sensor circuit poor electrical connection
How do I fix code P0473 AUDI?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
- Replacing the exhaust back pressure usually takes care of the problem
Cost of diagnosing the P0473 AUDI code
The cost of diagnosing the P0473 AUDI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
An Exhaust Back Pressure (EBP) signal that is detected out of range (high or low) by the Engine Control Module (ECM) will cause the engine to ignore the EBP signal and disable exhaust back pressure operation.
- Engine Light ON (or Service Engine Soon Warning Light)
P0473 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.