U1143: SCP (J1850) Invalid or Missing Data for Primary Id
LowNetwork/CommunicationNetwork Communication
What does U1143 mean?
U1143 is a diagnostic trouble code indicating "SCP (J1850) Invalid or Missing Data for Primary Id". This code relates to your vehicle's network communication and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Common causes
- Faulty network communication component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
This is a minor or informational code. Monitor for any changes in vehicle behaviour and address it during your next scheduled service visit.
Get a diagnosis for YOUR car
Code U1143 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.