U1009 Code: Meaning, Causes, and Symptoms | OBD2 Codes
U1009 – SCP Invalid or Missing Data for Engine Torque
U1009 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light),Check Trac Light / ABS Light On,Bucks at highway speeds
U1009 Possible Causes
Faulty / intermittent ignition module,J1850 / SCP Bus wiring intermittently open, shorted to power or ground,Faulty / intermittent connection at the Powertrain Control Module (PCM),Faulty EGR Sensor
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. The Powertrain Control Module (PCM) communicates over the Serial Communication Protocol (SCP) bus network, or J1850 bus. This is a medium-speed bus communication system and is fault tolerant, which means any type of intermittent/loose connection at these controllers will cause this code to set in memory, but will still operate, provided a data path is available. When the PCM is unable to communicate with any other controller at any time while the ignition switch is turned on, code U1009 will set. This is the typical reason for this code to set.