What does code P1154 mean on Hyundai vehicles?
The ECU detects a slow response from the upstream oxygen sensor on Bank 2 Sensor 1.
OBD-II Code Hyundai
P1154 — Hyundai — Heated Oxygen Sensor (HO2S) 1 Bank 2 Slow Response
The ECU detects a slow response from the upstream oxygen sensor on Bank 2 Sensor 1.
Common symptoms
- Check engine light illuminated
Possible causes
- Faulty or aged oxygen sensor
Initial recommendation
Replace the upstream oxygen sensor on Bank 2.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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