This code means that the oxygen sensor behind the catalytic converter is detecting that the catalytic converter is not reducing emissions as efficiently as it should be. This can be caused by a number of factors, including:
- A faulty oxygen sensor
- A faulty catalytic converter
- An air leak in the exhaust system
- An engine misfire
- A rich or lean fuel mixture
To diagnose this code, you will need to access the vehicle's trouble codes and then perform some tests to determine the cause of the code. The tests will involve checking the oxygen sensor readings, the exhaust system for leaks, and the engine for misfires. Once the cause of the code has been determined, you can then repair it and clear the code.
