What does code P1153 mean on Toyota vehicles?
The downstream air/fuel ratio sensor response is slower than expected.
OBD-II Code Toyota
P1153 — Toyota — Air/Fuel Ratio Sensor Circuit Response (Bank 1 Sensor 2)
The downstream air/fuel ratio sensor response is slower than expected.
Common symptoms
- Check engine light
- increased emissions
Possible causes
- Aging or contaminated air/fuel ratio sensor
Initial recommendation
Replace downstream air/fuel ratio sensor.
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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