U1110 – SCP Invalid or Missing Data for Primary Id

U1110 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),Engine cranks but may not start 鈥 may be intermittent,May or may not be able to communicate with a scan tool / depends on problem

U1110 Possible Causes

Faulty / intermittent ignition switch connections,J1850 / SCP / CAN Bus wiring intermittently open, shorted to power or ground,Faulty / intermittent connection at the Powertrain Control Module (PCM),Faulty / intermittent connection at the Anti-Lock Brake Module (ABS)

U1110 Description

This is a manufacturer specific fault code and can be used for several different faults, depending upon what the manufacturer wants to use it for. Controllers communicate over the Serial Communication Protocol (SCP) bus network, also known as J1850 bus, or Controller Area Network or CAN Bus. These bus communication systems may or may not be fault tolerant, which means any type of intermittent/loose connection between these controllers could cause communication to stop. When these controllers are unable to communicate with each other at any time while the ignition switch is turned on, code U1110 will set.