DATA LINK COMMUNICATION DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC	Description
DTC U1000	CLASS II DATA LINK MALFUNCTION (ID NOT LEARNED) - L61
DTC U1000	CLASS II DATA LINK MALFUNCTION (ID NOT LEARNED) - L81
DTC U1016	LOST COMMUNICATIONS WITH ENGINE CONTROL SYSTEM
DTC U1064	LOST COMMUNICATIONS WITH BODY MULTIPLE CONTROL SYSTEM
DTC U1088	LOST COMMUNICATIONS WITH RESTRAINTS CONTROL SYSTEM
DTC U1096	LOST COMMUNICATIONS WITH DRIVER INFORMATION & DISPLAYS CONTROL SYSTEM
DTC U1151	LOST COMMUNICATIONS WITH MOBILE COMMUNICATION CONTROL SYSTEM
DTC U1153	LOST COMMUNICATIONS WITH HVAC CONTROL SYSTEM
DTC U1300	CLASS II DATA LINK LOW - L61
DTC U1300	CLASS II DATA LINK LOW - L81
DTC U1301	CLASS II DATA LINK HIGH - L61
DTC U1301	CLASS II DATA LINK HIGH - L81
DTC U2100	CAN BUS COMMUNICATION MALFUNCTION (L81 ONLY)
DTC U2103	FEWER CONTROLLERS ON BUS THAN PROGRAMMED
DTC U2104	CAN BUS RESET COUNTER OVERRUN
DTC U2105	LOST COMMUNICATIONS WITH ENGINE CONTROL SYSTEM
DTC U2106	LOST COMMUNICATIONS WITH TRANSAXLE CONTROL SYSTEM
DTC U2107	LOST COMMUNICATIONS WITH BODY CONTROL SYSTEM

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Data Link Communication DTCS