U1018: SCP (J1850) Invalid or Missing Data for Throttle

What does U1018 mean?

U1018 is a diagnostic trouble code indicating "SCP (J1850) Invalid or Missing Data for Throttle". 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)

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 sits in a powertrain control module. The engine or transmission can drop into limp mode or cut out, which is its own hazard in traffic or on a motorway. Get it diagnosed before your next trip rather than waiting for the next service.