What does code U0603 mean?

Q: What does code U0603 mean?

Lost Communication With Fuel Pressure Sensor A. U0603 is a generic communication fault indicating that a control module on the vehicle's controller area network (CAN) bus has stopped receiving valid messages from the fuel pressure sensor designated as Sensor A. The module that sets this code has detected a loss of the periodic data signal that the sensor normally broadcasts, which can be caused by wiring faults, sensor failure, or network communication problems.

DTC codes / U06xx · Network communication / U0603

U0603Lost Communication With Fuel Pressure Sensor A

U0603 is a generic communication fault indicating that a control module on the vehicle's controller area network (CAN) bus has stopped receiving valid messages from the fuel pressure sensor designated as Sensor A. The module that sets this code has detected a loss of the periodic data signal that the sensor normally broadcasts, which can be caused by wiring faults, sensor failure, or network communication problems.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaNetwork communication

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.