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2017 AUDI A6

3.0L Supercharged V6•FWD•AUTOMATIC•gas•supercharged
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor565Torque3737Fluid6DTC922Battery0Maintenance0Recalls3
P0431moderate severityPowertrain

Warm Up Catalyst Efficiency Below Threshold Bank 2

on 2017 Audi A6 3.0L Supercharged V6 · FWD

What this code means

Bank 2 warm-up catalyst efficiency is below threshold.

Symptoms

  • Check Engine Light
  • Failed emissions

Common causes

  • Worn catalyst
  • Rich running during warmup
  • O2 sensor issue

Diagnostic steps

  1. Monitor catalyst
  2. Compare O2 signals
  3. Check exhaust

Repair notes

Replace warm-up catalyst if confirmed.

Other Powertrain codes on this vehicle

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