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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Data Link Communications >> Diagnostic Information and Procedures >> DTC U1000 and U1255: Critical Operating Parameter Has Not Been Received >> Conditions for Setting the DTC

Conditions for Setting the DTC

A message containing a critical operating parameter has not been received within the last 5 seconds after establishing class 2 serial data communication.