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2005 AUDI A4

3.0L V6•AWD•AUTOMATIC•gas
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor563Torque4698Fluid9DTC808Battery0Maintenance0Recalls4
P0161low severityPowertrain

O2 Sensor Heater Circuit Bank 2 Sensor 2

on 2005 Audi A4 3.0L V6 · AWD

What this code means

Malfunction in the downstream O2 sensor heater on Bank 2.

Symptoms

  • Check Engine Light
  • Failed emissions

Common causes

  • Faulty heater
  • Blown fuse
  • Wiring issue

Diagnostic steps

  1. Check fuse
  2. Test heater resistance
  3. Inspect wiring

Repair notes

Replace sensor.

Other Powertrain codes on this vehicle

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