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2013 ACURA ILX
2.4L I4•FWD•AUTOMATIC•gas
6 active safety recalls on this vehicle — view recalls
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Repairs0Labor473Torque2155Fluid7DTC1911Battery1Maintenance0Recalls6
P1163moderate severityPowertrain

HO2S Bank 1 Sensor 1 Slow Response

on 2013 Acura ILX 2.4L I4 · FWD

What this code means

The upstream O2 sensor is switching too slowly between rich and lean.

Symptoms

  • CEL
  • Poor fuel economy
  • Increased emissions
  • Rough running

Common causes

  • Aging sensor
  • Contaminated sensor
  • Exhaust leak
  • Fuel quality issue

Diagnostic steps

  1. Monitor switching rate
  2. Check for exhaust leaks
  3. Test sensor heater
  4. Compare to specs

Repair notes

Replace O2 sensor.

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