causes very poor gas mileage
sending wrong fuel ratio mix
co2 sensor?
An oxygen sensor is bad when it is no longer performing inside a set of parameters that are designated and optimal. The oxygen operates in a very narrow window of voltage and provides feedback to the engine to adjust the air/fuel ratio to maintain performance and emissions. If the sensor is bad and returning poor data, the performance, emissions and mileage will suffer.
Go by the miles travelled. Refer to the owners manual for the replacment schedule. A new oxygen sensor will give you better fuel economy and performance.
Upstream Oxygen Sensor heater performance. That will be the first oxygen sensor in the exhaust pipe ( closest to the engine ) on the passenger side head. You need to check the wireing connector that hooks to the oxygen sensor for a broken wire are bad connection. If you find no problems, then replace oxygen sensor.
Yes it will.
Just in front of the Cat converter, drivers side.
A fuel level sensor will not affect performance. Fuel level can due to weight of fuel and accumulated heat in the returned fuel from the engine.
A bad O2 sensor can affect gas mileage. It is an emissions sensor, so when it goes bad, it does not reflect emissions performance on the car, which could cost a lot in gasoline.
The oxygen sensor on a 98 Chevy K1500 truck is located in the exhaust manifolds. It monitors oxygen levels in the exhaust gases and allows the computer to make adjustments for optimal performance.
If it is malfunctioning it can affect fuel mileage.
It will make the air/fuel ratio be off and affect performance and emissions