U1140: SCP (J1850) Invalid or Missing Data for Gateway
HighNetwork/CommunicationNetwork Communication
What does U1140 mean?
U1140 is a diagnostic trouble code indicating "SCP (J1850) Invalid or Missing Data for Gateway". 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.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Noticeable change in engine performance
- Unusual sounds or vibrations
- Possible issues with network communication operation
- Vehicle may enter reduced power mode (limp mode)
Estimated repair cost
Typical range in Australia (parts + labour)
$200 – $1200 AUD
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 code is a fault on the vehicle data network itself rather than in one named module. Anything on that bus can be affected, safety systems included, and the code alone does not tell you which. Have the network scanned properly rather than assuming it is minor.
Get a diagnosis for YOUR car
Code U1140 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.