Network, generic

U022F Lost Communication With Object Detection Maintenance Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U022F is the B counterpart: a control unit expects messages from object detection maintenance control module B and receives none. Cars with many cameras and radars could split sensor upkeep, such as washer pumps, nozzle valves or cover heaters, across two units, and B would then serve the second group; which sensors that is stays the maker's choice, because no manufacturer documents U022F publicly. Setting follows the GM pattern for lost communication codes, a missing periodic status frame with supply between 9 and 16 V. If U022E is stored as well, check a shared fuse, ground or bus branch before suspecting either unit. U0530 covers invalid data from B. A soiled sensor may then remain uncleaned, and assistance functions can shut down.

Likely causes

Fuse, ground or bus branch shared with module A interrupted
Corroded plug at module B
Module B faulty or software not matching

Symptoms

  • Sensor blocked or cleaning unavailable message
  • Camera or radar based assistance switched off

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–900
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

obj detect module bcan bus

Related codes

U022EU0530U052F

References: patents.google.com, saabwisonline.com.