What is the function and testing procedure of an oxygen sensor on 1990 Mazda B2200?

The oxygen sensor informs the computer on the condition of the engine between rich and lean. Closed loop is reached more quickly with the help of heated sensors. Testing is done to determine resistance and voltage variation. In order to replace it, one needs to disconnect the battery, lift the vehicle, unscrew the old sensor, install the new sensor, and reconnect everything after that.

Genuine 1990 Mazda B2200 Oxygen Sensor

Oxygen O2 Sensor

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1990 Mazda B2200 Oxygen Sensor Part Number: G609-18-861-9U
$42.61 MSRP: $313.23
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Product Specifications
- Other Name: Sensor, Oxygen
- Replaces: G609-18-861
- Item Weight: 0.80 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: G609-18-861-9U
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
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Fits the following 1990 Mazda B2200 Submodels:
- Base, LE-5, SE-5 | 4 Cyl 2.2 L GAS

1990 Mazda B2200 Oxygen Sensor Parts and Q&A

Q: What is the function and testing procedure of an oxygen sensor on 1990 Mazda B2200?
A: The oxygen sensor informs the computer on the condition of the engine between rich and lean. Closed loop is reached more quickly with the help of heated sensors. Testing is done to determine resistance and voltage variation. In order to replace it, one needs to disconnect the battery, lift the vehicle, unscrew the old sensor, install the new sensor, and reconnect everything after that.