Walker Products 250-54043 oxygen sensor for the 2019-2020 Volvo S90 4-cylinder 2.0L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine burns fuel. This Walker Products oxygen sensor is a 4-W air fuel ratio, wide-band unit made for its specific application and fitment position.
- Electrodes made of a gas-permeable platinum layer
- Measures oxygen levels to help fine-tune the air-fuel mixture for fuel economy
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 250-54043 oxygen sensor
- Fits: 2019-2020 Volvo S90 4-cylinder 2.0L and other vehicles
- Position: Upstream, upstream left, upstream right
- Condition: New
A failing sensor can show up as a rough-running engine, higher fuel use, more exhaust emissions or a lit malfunction indicator light. These signs alone do not prove the sensor is at fault, since an exhaust leak is another common cause, so find the cause first. With the engine off, look the sensor, wiring harness and connector over for physical damage.
Fits
Among the vehicles it fits are the 2019-2022 Volvo XC40 4-cylinder 2.0L and the 2018-2021 Volvo V90 4-cylinder 2.0L. The 2019-2020 Volvo S90 4-cylinder 2.0L takes one sensor, and the count changes on other applications. If your car is not named here, enter its year and engine in the "Vehicles it fits" section to see whether this sensor is listed for it.
Specifications
Fit and size
- Position: upstream, upstream left, upstream right
- Quantity per vehicle: 1 or 2, depending on the application
Build and materials
- Type: 4-W air fuel ratio, wide-band
- Electrodes: gas-permeable platinum layer
- Condition: New
Frequently Asked Questions
Does the Walker Products 250-54043 oxygen sensor fit the 2019-2022 Volvo XC40 4-cylinder 2.0L?
Yes. The Walker Products 250-54043 is listed for the 2019-2022 Volvo XC40 4-cylinder 2.0L, and that engine takes one sensor.
Is the Walker Products 250-54043 an upstream or downstream oxygen sensor?
The Walker Products 250-54043 is listed for the upstream position, including upstream left and upstream right. It is not listed as a downstream sensor.
Is this oxygen sensor a wide-band air fuel ratio sensor?
Yes. This sensor is a 4-W air fuel ratio, wide-band type. It determines the oxygen content of the exhaust gas and monitors the air fuel ratio for combustion efficiency.
What signs can point to a failing wide-band oxygen sensor?
The engine may run poorly, fuel use may go up, or the malfunction indicator light may come on. With the engine off, you can look at the wiring harness and connector for physical damage.
What does the coating on this oxygen sensor do?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases. The electrodes are made of a gas-permeable platinum layer.
