Boost/Pressure Sensor Error Code
 

I've noticed that while driveing my '88 N/A 'vert with the 2 LED ECU error checker that the boost/Pressure sensor error is lighting. One long followed by 2 short flashes of LED 1. It only happens when I'm cruising at greater than 3700 RPM and I let my foot off the accelerator. It just flashes the error code once or twice.
Does anyone know what exactly is the significance of this?