The U0550 code indicates that the vehicle's network received invalid data from the side obstacle detection control module D. This typically points to a communication problem rather than a direct engine issue.
The module may be malfunctioning and transmitting erroneous signals on the CAN bus, triggering the invalid data condition.
Corroded, damaged, or loose pins in the harness can disrupt communication and cause the network to detect invalid data.
A short to ground, short to voltage, or high resistance on the bus can corrupt data frames traveling between modules.
A nearby module sending malformed messages can be interpreted as invalid data from module D.
A PCM fault is uncommon for this code; it usually only occurs if the PCM is incorrectly interpreting bus traffic.
No. The code will reappear if the underlying communication fault persists, so the root cause must be addressed.
Usually not. U0550 is almost always caused by the side obstacle detection module, wiring, or CAN bus, not the PCM.
The vehicle can generally be driven, but features like rear cross‑traffic alert may be disabled, so the issue should be repaired promptly.
It is moderately urgent because loss of obstacle detection can reduce safety assistance; repair should be scheduled at the next convenient service opportunity.