U1135: SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter
LowNetwork/CommunicationNetwork Communication
What does U1135 mean?
U1135 is a diagnostic trouble code indicating "SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter". 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 U1135 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.