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Implausible signal

United Kingdom
Hi I’ve an 8V 2016 model, getting some faults listed on the past 3 scans. Fired engine check light past 2 occasions. Recently had new battery, as last one died, so thought that’s what these faults were from. Since then been cleared twice and came back twice..

Not sure what this implausible signal issue is or what could be causing it? And whether or not the struck lean o2 issue is just a coincidence or actually just firing because of the signal issue

Please help, no idea on this one. Any ideas around common issues with these faults fired?

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