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2012 AUDI A6

3.0L Supercharged V6AWDAUTOMATICgassupercharged
8 active safety recalls on this vehicle — view recalls
Repairs0Labor991Torque6374Fluid15DTC1810Battery0Maintenance0Recalls8
P2204moderate severityPowertrain

NOx Sensor Circuit Intermittent Bank 1

on 2012 Audi A6 3.0L Supercharged V6 · AWD

What this code means

Intermittent signal from the NOx sensor on bank 1.

Symptoms

  • Intermittent check engine light
  • Erratic SCR operation

Common causes

  • Loose connection
  • Damaged wiring
  • Sensor connector moisture ingress

Diagnostic steps

  1. Wiggle test wiring and connector
  2. Check for water intrusion
  3. Monitor signal stability

Repair notes

Clean and secure connector. Replace sensor or repair wiring if intermittent.

Other Powertrain codes on this vehicle

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