U2104

Engine control module (ECM), CAN data bus - malfunction detected

DTC U2104, sometimes indicated as U210400 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle user network.

  • U2104 00: Engine control module (ECM), CAN data bus - malfunction detected

DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • 050604025 - ENGINE AND ENGINE COOLING
    CHEVROLET: Revised diagnostic trouble code (dtc) U2104. *tt
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