p1131
Moderate
Lincoln · Sedans
Heated Oxygen Sensor (HO2S) Insufficient Switching (Bank 1 Sensor 1)
Quick Answer
Error code P1131 on your Lincoln Sedans means: Heated Oxygen Sensor (HO2S) Insufficient Switching (Bank 1 Sensor 1). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect oxygen sensor connector and wiring
2
Test oxygen sensor heater circuit
3
Check fuel system pressure and trim
4
Replace oxygen sensor with OEM part
5
Verify exhaust system integrity
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Heated oxygen sensor
Oxygen sensor socket
Electrical connectors
Anti-seize compound
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