Thanks to all who wrote in this forum. I had the exact same symptoms once, stalled at a busy junction. But has not come back. Although I sense that the engine sometimes misses when decelerating. I took it to my mechanic along with this post. He shorted some jumper in the diagnostics plug in the engine bay and went look at the Check engine light. It was blinking 22 <==> Engine Coolant Temperature sensor. It the one connected to a brown and green wired on the radiator return manifold on the 5SFE engine Camry 93 Aussie Wide body model. 260K KMs Thanks to all who contributed. Cheers.