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