Code U0555 indicates that a vehicle control module has received data from the Remote Start Module that is out of range, corrupted, or logically incorrect. This is a communication error where the module is talking, but the information it is sending is not recognized as valid by the receiving computer.
Internal electronic failure within the remote start module causing it to transmit corrupted data packets.
Frayed, shorted, or corroded communication wires (CAN bus or LIN bus) causing signal interference.
A weak battery or failing alternator causing unstable voltage, leading to erratic module behavior.
Corrupted or obsolete firmware in the remote start module that is incompatible with other vehicle modules.
A hardware fault in the receiving module (such as the BCM or PCM) that prevents it from correctly interpreting valid data.
Yes, the vehicle is typically drivable, but the remote start feature will be disabled until the fault is resolved.
No. While the PCM receives the data, U0555 almost always points to the Remote Start Module or the wiring between them; replacing the PCM is rarely the correct first step.
Unlikely. A blown fuse typically results in a 'Lost Communication' code rather than an 'Invalid Data' code, as the module would be completely powered off.