Is this the cheapest O2 sensor to replace?

Often yes — downstream sensors are cheaper parts and usually easier to access than upstream sensors.

Can I ignore this code?

You can drive indefinitely with no symptoms, but you will fail emissions inspection.

Low Severity

Emissions System

Heater failure in downstream O2 sensor bank 2.

Common Fix

Replace O2 sensor

Estimated Cost (DIY)

$25 - $80

Burned-out heaterlikely

Blown fusepossible

Corroded connectorpossible

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Is this the cheapest O2 sensor to replace?: Often yes — downstream sensors are cheaper parts and usually easier to access than upstream sensors.
Can I ignore this code?: You can drive indefinitely with no symptoms, but you will fail emissions inspection.

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