P2197 - OBD II Trouble Code

Our automotive experts have put together the following information about the P2197 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P2197 code.

What Does P2197 Code Mean?

OBD-II Code P2197 is defined as a O2 Sensor Signal Biased/Stuck Lean

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 P2197.

P2197 Symptoms

• Decreased engine performance
• Increased fuel consumption

Common Problems That Trigger the P2197 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 P2197 Code

• Oxygen Sensor Replacement