This code indicates the vehicle's control module cannot establish communication with the front distance range sensor used for adaptive cruise control and collision avoidance. The sensor is typically mounted behind the front grille or emblem and requires intact wiring and power to transmit data. When this communication is lost, safety systems relying on forward radar data are disabled.
The sensor unit itself is the most common failure point due to constant exposure to road debris, moisture, and temperature extremes.
Wires leading to the front grille area are susceptible to chafing, rodent damage, or impact damage from minor front-end contact.
Water intrusion at the sensor electrical connector can cause high resistance, corrosion, or an open circuit preventing communication.
A dedicated fuse for the sensor or radar module may have blown due to a short circuit or power spike.
Physical damage to the mounting bracket or heavy debris blocking the sensor face can interrupt signal transmission.
Internal communication failure within the receiving module is rare and should only be considered after all external components and wiring are verified.
No, this code relates to the front radar sensor network, not engine management, and replacing the PCM is rarely the solution.
Yes, but adaptive cruise and collision avoidance features will not work, requiring increased driver attention and following distance.
Heavy mud or ice can block the sensor, but a communication loss code usually indicates an electrical fault rather than simple obstruction.
Yes, most vehicles require static or dynamic alignment calibration after replacing or disturbing the sensor mounting to ensure accuracy.