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Home/DTC Codes/Audi/A6/2014-2014 3.0L Supercharged V6/P0405
P0405

EGR Sensor A Circuit Low

2014-2014 Audi A6 3.0L Supercharged V6

Moderate SeverityPowertrainGeneric (SAE)

The 2014 Audi A6 is equipped with a 3.0L V6 engine. Below you'll find detailed p0405 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

Low voltage from the EGR position sensor A.

Symptoms

  • Check Engine Light
  • EGR control issues

Common Causes

  • Short to ground in sensor circuit
  • Faulty sensor
  • Wiring damage

Diagnostic Steps

  1. Test sensor voltage
  2. Check for shorts
  3. Inspect wiring

Repair Notes

Repair wiring or replace EGR valve (sensor often integrated).

Related Codes

P0400Exhaust Gas Recirculation (EGR) FlowP0406EGR Sensor A Circuit High

Other Powertrain Codes

P0405 on Other Vehicles

Audi A3

1996-1996 1.6L I4

Audi A3

1996-1996 1.8L Turbo I4

Audi A3

1997-1997 1.6L I4

Audi A3

1997-1997 1.8L Turbo I4

Audi A3

1998-1998 1.6L I4

Audi A3

1998-1998 1.8L Turbo I4

Audi A3

1999-1999 1.6L I4

Audi A3

1999-1999 1.8L Turbo I4 Quattro

Common Questions

What does code P0405 mean on a 2014-2014 Audi A6?

P0405 stands for "EGR Sensor A Circuit Low". Low voltage from the EGR position sensor A.

What are the symptoms of P0405 on a Audi A6?

Common symptoms of P0405 include: Check Engine Light, EGR control issues.

What causes P0405 on a 2014-2014 Audi A6?

Common causes of P0405 include: Short to ground in sensor circuit, Faulty sensor, Wiring damage.

Last updated: March 2026

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