Opel Corsa D "check engine" light blinks DTC error codes

"Check engine" light remained lit up on the dash of my Opel Corsa D 1.4 petrol for an unknown reason. What can be seen here is "check engine" light blinking DTC error codes during a "pedal test" (brake and accelerator pedal pressed fully, ignition key turned to "contact" position; gearbox in neutral, NO cranking!). I¬ an expert and unfortunately I failed to notice any intelligible codes here. DTC codes have four digits and powertrain-related ones usually start with "0" (10 consecutive blinks) or "1" (1 blink) but those I&recorded here differ in length and pauses between them are not distinct... However car is driveable, I¬ noticing any engine performance issue or any other perceptible symptom. Real error status is yet to be determined in the workshop, with a proper diag tool... (Edit: "check engine" light turned off by itself after a couple of days, no reset or any other intervention except tightening the gas tank cap and re-plugging a few sensor connectors, lol)