U022F code meaning
Lost Communication With Object Detection Maintenance Control Module B
What U022F means
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.
U022F at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U022F
- Sensor blocked or cleaning unavailable message
- Camera or radar based assistance switched off
Common causes of U022F
- Most likelyFuse, ground or bus branch shared with module A interrupted
- PossibleCorroded plug at module B
- Less likelyModule B faulty or software not matching
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Obj detect module bCAN bus
What each part of U022F means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 2F | The exact fault in that area. |
What to do next
- Note U022F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U022F
What does U022F mean?
U022F means "Lost Communication With Object Detection Maintenance Control Module B". U022F is the B counterpart: a control unit expects messages from object detection maintenance control module B and receives none. It is a generic code, so it means the same on every make.
Is it safe to drive with U022F?
U022F does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U022F fail an emissions test?
U022F is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U022F to fix?
Difficulty: hard. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U022F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.