What Does P2196 Code Mean?

OBD-II Code P2196 is defined as a O2 Sensor Signal Biased/Stuck Rich

The Oxygen Sensor (or Air/Fuel Ratio Sensor) tells the engine control module how much oxygen is in the exhaust stream between the engine and the Catalytic Converter. The Oxygen Sensor's signal is supposed to fluctuate a minimum of 10 times per second within a specified range. If the engine's control module (PCM) determines that the Oxygen Sensor is not fluctuating throughout the normal range, the PCM will set code P2196.

P2196 Symptoms

  • Decreased engine performance
  • Increased fuel consumption

Common Problems That Trigger the P2196 Code

  • Oxygen sensor failure
  • Powertrain Control Module (PCM) failure
  • Powertrain Control Module (PCM) software needs to be updated
  • Wiring issue

Common Repairs Needed for the P2196 Code

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