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Home >> Chrysler >> 2021 >> Voyager LXi, Gas >> Repair and Diagnosis >> Transmission >> Automatic Trans >> 948TE/9HP48 Automatic Transmission - DTCS P1731-00 To U1467-00 >> DTC Troubleshooting >> P1D78-00-Park Solenoid Circuit Low >> Possible Causes

Possible Causes

Possible Causes
SOLENOID SUPPLY 1 CIRCUIT OPEN
SOLENOID SUPPLY 1 CIRCUIT SHORTED TO GROUND
PARK LOCK SOLENOID CIRCUIT OPEN
PARK LOCK SOLENOID CIRCUIT SHORTED TO GROUND
PARK LOCK SOLENOID CIRCUIT SHORTED TO VOLTAGE
PARK LOCK SOLENOID
TRANSMISSION CONTROL MODULE (TCM)
NOTE:

In the schematic below, the T41/L1 and T42/L2 circuits are only present in Shift by Cable applications.

GC0186833Courtesy of CHRYSLER GROUP, LLC

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .