What is 02 fault code on Suzuki Grand Vitara?

The O2 fault code on a Suzuki Grand Vitara typically indicates an issue with the oxygen sensors, which monitor the air-fuel mixture in the engine. This code can suggest that the sensor is malfunctioning, clogged, or that there are exhaust leaks affecting its readings. It may lead to poor fuel efficiency and increased emissions if not addressed. It's advisable to have the vehicle diagnosed and repaired to ensure optimal performance.