P1791

Test 477 - 480:

Test 481:

Symptom:
P1791-LOSS OF PRIME

When Monitored:
The transmission is any forward gear.

Set Condition:
The code will set if the transmission is slipping in any forward gear and the pressure switches are not indicating pressure, a LOSS of PRIME test is run.

POSSIBLE CAUSES
CHECKING SYMPTOMS AND POSSIBLE CAUSES
LOW BATTERY VOLTAGE CAUSING SYMPTOM
INTERMITTENT CODE P1791

Test 171 - 175:

POSSIBLE CAUSES
AUTO TRANS INCORRECT FLUID LEVEL OR COOLER LINES
CUSTOMER DESCRIBES "NO DRIVE" CONDITION
FILTER PLUGGED, PAN FILLED WITH DEBRIS
OIL PUMP PRESSURE DROP AND "NO DRIVE" CONDITION