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Hi all, my 2004 tahoe is showing an o2 sensor heater circut error code. Was wondering if it is a hard fix or if replacing sensor is not too hard. It has 39000 miles. Would be grateful for any input or advice
 

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Shouldn't be bad on something that new.

Plenty of PB Blaster.
 

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Hi all, my 2004 tahoe is showing an o2 sensor heater circut error code. Was wondering if it is a hard fix or if replacing sensor is not too hard. It has 39000 miles. Would be grateful for any input or advice
Go easy!~ My 03 TB sensor broke had to replace manifold...ya big bucks to replace.
If you plan on doing yourself and it doesn't let go with mild pressure. STOP. and try penetrating oil or heat. Good Luck
 

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Wait

O2 sensor is part of the emission control system, isn’t it?

If it is then it should be covered under warranty for 50,000 miles. I would check that first. Before trying to do it yourself
 
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