Red triangle of death goes on then immediately off, with regularity

[2007 base model] I had my ABS system and brake pump replaced 3 weeks ago (ouch). A couple days later I was braking at a stop light and the Red Triangle of Death (RTOD) came on, and stayed on. I pulled to the side of the road, turned off the car, restarted and it was gone.

Since then it has come on almost each day, for literally a second, and then goes off. No other warning lights come on. I can't piece together any correlations, but I believe:
1) Never when traveling normally at high (40+ mph) speed;
2) Usually when braking slowly around a turn (~15, 20mph)
3) Sometimes when accelerating in a turn at an intersection after stopping.

Commonalities: 1 second alert, turning, barking (though not always).

I'm taking it to my mechanic this weekend to check any codes but wondered if anyone had experience with this.

Thanks!
Chris

 

Thank-you for the replies. My copyeditor must be on vacation, I meant "braking" not barking--no dogs involved.

I am close to my 5000mi. oil change, so I'll investigate the oil level, it's due for a change next weekend.

I was also advised by a friend who said her old Mazda RAV4 had similar behavior after some major work and the culprit was one pin in the myriad of wires, fuses was not re-seated properly. Has anyone heard of that?

 

Low oil level: confirmed.

I checked and it was low, very low. Changed oil and filter this week, no further RTOD.

? for someone who is not a "car guy" - the Toyota maintenance literature recommends changing the oil every 5000 miles...
1) Is this not proper guidance (i.e., should be every 3000 miles)? or
2) Valid except when your car is older (such as mine) then every 3000 miles (or other).

Thanks,
Chris