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Discussion Starter · #1 ·
Hi All;

I recently purchased an ODB2 reader and got a fault code of P0030, which when looked up gave me the following message:

HO2S Bank 1 Sen 1
Heater Circuit

Does anyone have an idea of what this is? And, is there a book or site out there where I can look up the codes and receive a quick reference on how to repair?

Thank you!

Gary
 

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Oxygen sensor or Lamba sound.

You should replace it they go bad pretty often.
 

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No prob. BTW you can pick up an OBDII reader for less than $50 on ebay now. Most cities you can find one at your local auto parts store.

Just remember....Volvo does not like you hacking the car...it may void the warranty.
 
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