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P0474 Audi Code - Exhaust Pressure Sensor Intermittent

- Code Popularity: 1,710 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0474 Audi?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Exhaust Back Pressure Sensor
  • Exhaust Back Pressure Sensor harness is open or shorted
  • Exhaust Back Pressure Sensor circuit poor electrical connection
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How to Fix the DTC P0474 Audi?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

Replacing the exhaust back pressure usually takes care of the problem

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0474 Audi code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to 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.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P0474 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.

OBDII Code P0474 Audi - Exhaust Pressure Sensor Intermittent - AutoCodes.com
P0474 Audi Code - Exhaust Pressure Sensor Intermittent

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Code P0474 Audi comments

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