Dear friends,

I am new to this forum, if there a similar thread exists I apologise.
I own a mentioned Mazda with 220k km, bought her used in Aug 2024, ran fine went on longer trips, had no issues. Near the start of the winter season I bought a brand new battery and switched on dot 21 Continental winter tires.

Evers sInce then I am getting fault codes, and dash warning lights with CEL sometimes and engine goes to limp mode. Scbs insection, tpms inspection, dcs and master warning.
I will attach a picture of the fault codes.

Errors show up on downhile drive and if I speed up the car while overtaking someone. Also during icy conditions on steep downhill when I try to engine break in 1st gear, the errors show up as soon as I cross 2000 rpms. After engine shutdown errors dissappear untill I speed up again.

I tried decarbonisation with the H2 machine, maf and map sensor cleaning.

Any help would be appreciated.

Best regards

Mirza Ovčina