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DTC U1039: - SCP (J1850) Invalid Or Missing Data For Vehicle Speed

DTC U1039: - SCP (J1850) INVALID OR MISSING DATA FOR VEHICLE SPEED

Description: 
Possible Causes:  Network DTC(s) occur during module-to-module communication concerns. Two types of network concerns can be categorized:
  • Invalid data network concerns - data is transferred within the normal inter-module message, but contains known invalid data. The transmitting module logs a DTC related to the invalid data concern.
  • Missing message network concerns - missing message concerns are logged by the module upon failure to receive a message from another module within a defined retry period.
Diagnostic Aids:  Carry out the on-board diagnostics for the associated network module.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the MODULE COMMUNICATIONS NETWORK service information to diagnose the no international standards organization (ISO) 9141 network communication symptom or the anti-lock brake system (ABS) module does not respond to the scan tool symptom.
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