Quote:
What are the symptoms of a bad oxygen sensor?
Symptoms of a Bad Oxygen Sensor:
When you have a bad oxygen sensor, your vehicle will run less efficiently, it can sometimes have a poor idle, erratic jerking at steady throttle, hard starting problems, cause the check engine light to come on, and will cause high fuel consumption.
Quote:
How do you know if your oxygen sensor is bad?
Check this list to see if it's time to replace YOUR vehicle's oxygen sensors:
Sudden decrease in fuel mileage....
Flashing check engine light or malfunction indicator lamp in the vehicle?s dash board....
Failure to pass smog....
Overall poor vehicle performance; rough idling, stalling, hesitation on acceleration, etc.
2000 Buick LeSabre
My fuel mileage has been pegged at 17.1 mpg for several months now. When I first bought the car when it was only 5 years old, fuel mileage was pegged at 19.6 mpg. Some websites recommend changing the oxygen sensor every 100k. The car now has over 131k and is still on the original upstream and downstream oxygen sensors. Idle quality is not super smooth and fuel mileage is down. No scanner to check fuel trims, so if I replaced the upstream oxygen sensor, it would be based on a hunch and the above info.
What are the symptoms of a bad oxygen sensor?
Symptoms of a Bad Oxygen Sensor:
When you have a bad oxygen sensor, your vehicle will run less efficiently, it can sometimes have a poor idle, erratic jerking at steady throttle, hard starting problems, cause the check engine light to come on, and will cause high fuel consumption.
Quote:
How do you know if your oxygen sensor is bad?
Check this list to see if it's time to replace YOUR vehicle's oxygen sensors:
Sudden decrease in fuel mileage....
Flashing check engine light or malfunction indicator lamp in the vehicle?s dash board....
Failure to pass smog....
Overall poor vehicle performance; rough idling, stalling, hesitation on acceleration, etc.
2000 Buick LeSabre
My fuel mileage has been pegged at 17.1 mpg for several months now. When I first bought the car when it was only 5 years old, fuel mileage was pegged at 19.6 mpg. Some websites recommend changing the oxygen sensor every 100k. The car now has over 131k and is still on the original upstream and downstream oxygen sensors. Idle quality is not super smooth and fuel mileage is down. No scanner to check fuel trims, so if I replaced the upstream oxygen sensor, it would be based on a hunch and the above info.