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What does the 2004 Ford F-150 error code P2195 mean?

P2195-O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)

Possible causes:

- Faulty Oxygen Sensor (Bank 1, Sensor 1)

- Oxygen Sensor harness is open or shorted

- Fuel pressure/regulator problem

- Intake air leak

- Mass Air Flow (MAF) sensor problem

- Faulty fuel injector on Cylinder 1

- Engine Coolant Temperature (ECT) sensor failure

- Insufficient Fuel System Pressure

- Engine mechanical condition

- PCM failure