Mercedes B Klasse Hybrid Check Engine Light and Fuel Consumption

That sounds familiar Was your fuel efficiency noticeably worse Did you check the O2 sensor connections before the quote

Yes fuel efficiency is worse I haven't checked the connections yet but I plan to Should that be my first step Did you replace your O2 sensor or was it just a connection

Mine needed a new O2 sensor eventually Check the connections first If that doesn't fix it get it checked professionally Better safe than sorry with the catalytic converter

Thanks for the advice It was a loose connection like you thought I cleaned it and the error is gone Fuel consumption seems normal now Thanks