Check Engine light and error code P2177 in a Seat Exeo

Hello everyone, I own a 2011 Seat Exeo with a gasoline engine and 122,000 km on the odometer. For some time now, the check engine light has been on and I'm getting the error code P2177, which indicates a lean mixture on bank 1. At 114,500 km, the engine was overhauled and I replaced the mass air flow sensor, but I didn't find any vacuum leaks. When I clear the error, it reappears after about two weeks. However, I drive very little, only about 1200 km per year. Does anyone have an idea what could be causing this or what I should check next? Thank you very much in advance for your help!

(Translated from German)

1 comment(s)

Check the fuel system for any issues, starting with the fuel filter. A clogged fuel filter can restrict fuel flow, leading to a lean condition. If the filter hasn't been replaced recently, consider doing so. Also, inspect the fuel pressure to ensure it's within the manufacturer's specifications. Let me know how it goes or if you have any further questions!

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