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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 25 (8HP75 Automatic Transmission - DTCS P1D79-00 To U1489) >> Diagnosis And Testing >> U0074-00: Dedicated Powertrain (D-Pt) Can Bus Off >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
PRIVATE CAN BUS (+) CIRCUIT OPEN OR HIGH RESISTANCE
PRIVATE CAN BUS (-) CIRCUIT OPEN OR HIGH RESISTANCE
PRIVATE CAN BUS (+) CIRCUIT SHORT TO GROUND
PRIVATE CAN BUS (-) CIRCUIT SHORT TO GROUND
PRIVATE CAN BUS (+) CIRCUIT SHORT TO ANOTHER CIRCUIT
PRIVATE CAN BUS (-) CIRCUIT SHORT TO ANOTHER CIRCUIT
ELECTRONIC SHIFT MODULE (ESM)
TRANSMISSION CONTROL MODULE (TCM) ASSEMBLY

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