What does code P1129 mean on Ford vehicles?
A condition similar to P1128 is detected on another drive cycle or sensor.
OBD-II Code Ford
P1129 — Ford — O2 Sensor Signals Reversed
A condition similar to P1128 is detected on another drive cycle or sensor.
Common symptoms
- Check engine light
- increased fuel consumption
Possible causes
- Crossed wiring
- incorrect O2 sensor
Initial recommendation
Inspect O2 sensors and wiring connections.
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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