What type of cleaner? Was this running a bottle through the fuel tank or one of those run the engine  on the injector cleaner kits? Usually I find that using fuel and oil additives including cleaners or even change of brands and types is part of a response to something going wrong or at least changing and then when the inevitable happens it will be the fault of that product. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Neil N
Sent: Thursday, March 3, 2016 6:07 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Fuel injector cleaner: harm O2 sensor?

Hi all.

Has anyone found that running fuel injector cleaner has fouled their O2 sensor?

After running a bottle through, my check engine light came on briefly, once.
Trouble code recorded was for the O2 sensor. I know the code could've been thrown due to at least several reasons. I'll measure O2 voltage soon.

Thanks

Neil.

--
Neil n

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