What does code P1127 mean on Jaguar vehicles?
The ECU detects a malfunction in the downstream heated oxygen sensor on bank 1.
OBD-II Code Jaguar
P1127 — Jaguar — Heated Oxygen Sensor Downstream Bank 1 Malfunction
The ECU detects a malfunction in the downstream heated oxygen sensor on bank 1.
Common symptoms
- Check engine light on
Possible causes
- Faulty downstream oxygen sensor
Initial recommendation
Replace the downstream oxygen sensor on bank 1.
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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