mary_dragon85

Mercedes B Klasse Hybrid Check Engine Light and Fuel Consumption

My 2020 Mercedes B Klasse hybrid has an intermittent check engine light and increased fuel consumption at 212740 km I suspect an aging O2 sensor or connection issue The garage quoted 95€ for a new sensor Could the exhaust sensor be affecting the air-fuel ratio and catalytic converter

A 2020 Mercedes B Klasse hybrid experienced an intermittent check engine light and increased fuel consumption at 212,740 km. The suspected cause was an aging O2 sensor or a connection issue, potentially affecting the air-fuel ratio and catalytic converter. After checking and cleaning a loose connection, the error was resolved, and fuel consumption returned to normal.

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4 comment(s)

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

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MERCEDES

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BKLASSE