Essentially, the machine's software and its internal hardware components are communicating conflicting information about whether the color drive is engaged or disengaged. Recommended Troubleshooting Steps
Switch the power back on. Sometimes a simple restart clears temporary communication glitches. 2. Reseat Drum Cartridges
Inspect power supply voltages
for daily printer maintenance to help prevent these types of sensor errors in the future? Fault Code 043-343: YMC Link Sensor Fail - Xerox Support
Service Tip: Contact your Xerox service provider with your serial number and this specific code.