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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (8HP75 Automatic Transmission - DTCS P0219-00 To P1D78-00) >> Diagnosis And Testing >> P0816-00: Downshift Switch Circuit >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
OPEN PADDLE SWITCH SIGNAL CIRCUIT
PADDLE SWITCH RETURN CIRCUIT SHORTED TO GROUND
PADDLE SWITCH RETURN CIRCUIT SHORTED TO BATTERY
PADDLE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
PADDLE SWITCH SIGNAL CIRCUIT SHORTED TO BATTERY
OPEN PADDLE SHIFT GROUND CIRCUIT
PADDLE SWITCH
STEERING COLUMN CONTROL MODULE (SCCM)
TRANSMISSION CONTROL MODULE (TCM)

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