If you did the pedal dance several times and were seriously accurate with the times it says, the code won't clear because the fault has not been repaired. The intervals are critical when using the pedal. If the unit is older, the pedal may have wear and not be fully depressing. I have had to remove the floorplate and depress the actuating rod by hand. Just something to think about.
Just for giggles, you might check the coils. had one giving this code because a coil wasn't seated correctly.