Walker Products 250-241221 oxygen sensor for the 2017-2018 Ford Escape 4-cylinder 2.5L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine burns fuel. This downstream sensor sends the ECU the diagnostic feedback its application calls for.
- Four-wire, narrow-band design
- Electrodes made with a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Monitors the air-fuel ratio in the exhaust gas to help reduce pollutants
- Made for its specific application and position on the vehicle
Quick facts
- Part: Walker Products 250-241221 oxygen sensor
- Fits: 2017-2018 Ford Escape 4-cylinder 2.5L and other vehicles
- Position: Downstream
- Condition: New
A failing sensor can make the engine run poorly, raise fuel consumption and exhaust emissions, or light the malfunction indicator lamp. Before you replace this sensor, look over its wiring harness and connector for physical damage and have the stored fault codes read, since a worn sensor is only one possible reason for those signs.
Fits
This direct-fit downstream part is an oxygen sensor for the 2017-2018 Ford Escape 4-cylinder 2.5L and the 2016-2018 Ford Transit Connect 4-cylinder 2.5L.
Specifications
Fit and size
- Position: Downstream
- Quantity per vehicle: 1
- Number of wires: 4
Build and materials
- Type: Narrow-band
- Electrodes: gas-permeable platinum layer
- Condition: New
In the box
This listing is a single oxygen sensor, and a car it fits needs just the one.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this oxygen sensor replacement right for the 2017-2018 Ford Escape 4-cylinder 2.5L?
Yes. Walker Products 250-241221 is listed for the 2017-2018 Ford Escape 4-cylinder 2.5L as a downstream sensor, and the engine takes one.
Is this Walker Products oxygen sensor a narrow-band type?
Yes. Walker Products 250-241221 is a four-wire, narrow-band oxygen sensor that determines the oxygen content of the exhaust gas.
Is this an upstream or downstream oxygen sensor?
Downstream. This oxygen sensor is a downstream unit, and the listing holds one sensor.
What can a failing oxygen sensor do to the way my engine runs?
A failed sensor can make the engine run poorly, increase fuel consumption and exhaust emissions, or turn on the malfunction indicator lamp. A shop can read the stored fault codes.
What is the coating on this oxygen sensor's electrodes for?
On Walker Products 250-241221, the coating keeps combustion residue and particulates in the exhaust from contaminating or eroding the electrode surfaces. The electrodes use a gas-permeable platinum layer.
