Board of nursing casesRear Sensor. Fits QX56, QX80 QX56. Rear, all. Rear, w/o motion Control. Practice exams monash1. Check fuel pressure during a transmission Stall Test (see Service Procedure). 2. If fuel pressure test is NG, replace the fuel pump. Note: Low fuel pressure may cause DTCs to be detected. If you have DTCs with this incident, first replace the fuel pump and then recheck the DTC diagnosis.