What does code P1127 mean on Ford vehicles?
The oxygen sensor heater did not activate during the KOER diagnostic test.
OBD-II Code Ford
P1127 — Ford — O2 Sensor Heater Inactive During KOER
The oxygen sensor heater did not activate during the KOER diagnostic test.
Common symptoms
- Increased emissions
- higher fuel consumption
Possible causes
- Failed O2 heater circuit
- blown fuse
Initial recommendation
Inspect the O2 heater circuit, fuse and wiring.
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.
Analyze this code with MecaOBD
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