The oxygen sensor was replaced but the 'check engine' light won't go out. Now what? Which octane fuel is best? AAA's Car Doctor has answers.

Land Rover says some of its 2010-12 LR2 models may illuminate the Check Engine light and log O2 sensor trouble codes P2097 and P2099 in computer memory. If there are no drivability symptoms associated ...

If the sensor fails, becomes clogged, or if it gets a reading it’s not supposed to be getting, the faulty oxygen sensor will trigger your Check Engine light. 3.

With over 400,000 repairs nationwide, oxygen sensor replacements account for 8% of all check engine light repairs. Click here to see the most common check engine light repairs.

Ignoring a check engine light might feel harmless if the car still runs smoothly, but the warning signals more than a mi ...

The O2 sensor is a feedback control for the closed-loop engine control system...disabling it will cause the engine to run poorly or not at all.

Faulty Oxygen Sensor: According to CarMD, the most likely cause of an illuminated check engine light is a faulty oxygen sensor, which measures the amount of oxygen in a vehicle’s exhaust.

CarMD.com, a provider of automotive diagnostic data, reported 675 different possible reasons for a check engine light to come on.

The oxygen sensor was replaced but the 'check engine' light won't go out. Now what? Which octane fuel is best? AAA's Car Doctor has answers.