What does code P1151 mean on Ford vehicles?
The upstream oxygen sensor detects a constant lean condition on bank 2 with no proper switching.
OBD-II Code Ford
P1151 — Ford — Upstream O2 Sensor Indicates Lean Bank 2
The upstream oxygen sensor detects a constant lean condition on bank 2 with no proper switching.
Common symptoms
- Loss of power
- detonation
- irregular fuel consumption
Possible causes
- Vacuum leak
- faulty upstream O2 sensor
- unmetered air intake
Initial recommendation
Check for vacuum leaks and verify upstream O2 sensor operation.
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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