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P2196 - Oxygen Sensor Signal Biased/Stuck Rich - Bank 1 Sensor 1

Possible causes
- Faulty Front Heated Oxygen Sensor Bank 1
- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Vacuums leaks
What does this mean? What does this mean?
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
P2196 Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. A heated oxygen sensor (HO2S) indicating rich at the end of a test is trying to correct for an

over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

P2196 Information for specific makes
P2196 BMW O2 Sensor Signal Stuck Rich Bank 1 Sensor 1
P2196 CHRYSLER O2 Sensor Heater Circuit Fault
P2196 DODGE O2 Sensor Heater Circuit Fault
P2196 FORD Oxygen Sensor Signal Biased/Stuck Rich - Bank 1 Sensor 1
P2196 HYUNDAI HO2S Signal Stuck Rich Bank 1 Sensor 1
P2196 KIA HO2S Signal Stuck Rich Bank 1 Sensor 1
P2196 LEXUS Oxygen Air/Fuel Sensor Signal Stuck Rich Bank 1 Sensor 1
P2196 LINCOLN Oxygen Sensor Signal Biased/Stuck Rich - Bank 1 Sensor 1
P2196 MAZDA O2 Sensor Signal Stuck Rich Bank 1 Sensor 1
P2196 MERCURY Oxygen Sensor Signal Biased/Stuck Rich - Bank 1 Sensor 1
P2196 SCION Oxygen Air/Fuel Sensor Signal Stuck Rich Bank 1 Sensor 1
P2196 SUZUKI O2 Sensor Signal Stuck Rich Bank 1 Sensor 1
P2196 TOYOTA Oxygen Air/Fuel Sensor Signal Stuck Rich Bank 1 Sensor 1
P2196 VOLKSWAGEN O2 Sensor Signal Stuck Rich Bank 1 Sensor 1
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