You can trick the ecu into thinking the pump is still there by using a load resistor, just measure the load across the contacts on the pump.

I've disabled my air pump, as it causes the a/f ratio to be erroneously lean. I still have the CEL but it doesnt bother me. Right now Im working on the load resistor fix to see how it works out.

There should be a way through the PCM to disable the air pump.