I recently had a alarm go off at 3200 rpm, constant alarm and goes into gaurdian mode. Had the code read as low block pressure. A service tech changed the bad impeller and flushed the system and cleared the codes. That didn't fix the alarm problem. Still goes off at 3200 rpm and into gaurdian. Pulled the sensor on the power steering cooler, no gaurdian but 2 alarm beeps intermitintly. Could the sensor be bad or do i have other problems.