O2 Sensor Head Gasket

More than likely the fuel lines were removed or replaced which triggered the o2 sensor to go off.

O2 sensor head gasket.

So before replacing any of these sensors you must first find the real problem that pushed you in that direction. I have also been getting oxygen sensor codes being thrown every month or so the check engine light typically goes away. If there s a head gasket leak then yes it could. Oxygen sensor o2 what else could cause rich or lean codes replacement of a good oxygen sensor o2 is a common mistake made by diy mechanics all the time.

The code indicates the o2 sensor is on the same side of the engine that i see burnt coolant. I hope they u changed the plugs but the blown head gasket will cause damage to the o2 sen and the cat. Online shopping from a great selection at automotive store. If its a coolant type leak.

Oxygen sensor is just that it detects oxygen in the engine.