DTC B1304-04: Electronic Power Assisted Steering System - System internal failures: Action

Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signal - Main ECU Supply Voltage DD02. Refer to the electrical circuit diagrams and check the power steering control module power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary
Using the Jaguar Land Rover Approved Diagnostic Equipment, clear the DTCs and retest. If fault persists, install a new steering gear