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2018 LINCOLN MKX

2.7L EcoBoost V6•AWD•AUTOMATIC•gas•turbo
5 active safety recalls on this vehicle — view recalls
Repairs0Labor1190Torque9534Fluid15DTC1932Battery0Maintenance0Recalls5
P1150moderate severityPowertrain

Lack of HO2S Switch — Adaptive Fuel at Limit (Bank 2)

on 2018 Lincoln MKX 2.7L EcoBoost V6 · AWD

What this code means

The upstream heated oxygen sensor on Bank 2 is not switching properly, and the adaptive fuel strategy has reached its correction limit on Bank 2.

Symptoms

  • Check Engine Light
  • Poor fuel economy
  • Rough idle
  • Failed emissions

Common causes

  • Large vacuum leak affecting Bank 2
  • Faulty O2 sensor Bank 2
  • Exhaust leak near Bank 2 sensor
  • Fuel delivery issue Bank 2

Diagnostic steps

  1. Check for vacuum leaks on Bank 2 side
  2. Monitor O2 sensor switching
  3. Check fuel pressure
  4. Inspect exhaust for leaks

Repair notes

Repair vacuum or exhaust leaks. Replace O2 sensor if not switching.

Other Powertrain codes on this vehicle

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