U044F code meaning
Invalid Data Received From Mirror Control Module B
What U044F means
U044F is stored when a controller receives data from mirror control module B that it cannot use; U014D is lost contact, U0514 covers module A. Depending on design, mirror modules adjust, fold and heat the exterior mirrors, store memory positions or run an interior mirror with camera display. Stellantis shows how the letters are assigned: case S2108000013 for the 2021 Jeep Grand Cherokee names module A as the combined rear view mirror module inside the cabin, whose lost-contact code U0213 sets in the BCM after a configuration restore wrongly enables a mirror that is not fitted. No manufacturer documents U044F publicly. FMVSS 111 sets the rear visibility rules such mirrors serve. Expect memory, folding, dimming or display functions handled by module B to stop working.
U044F at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U044F
- Mirror adjustment, folding or memory function inoperative
- Camera mirror display or automatic dimming unavailable
Common causes of U044F
- PossibleVehicle configuration does not match the fitted mirror modules
- PossibleDamaged wiring in the door hinge area or loose mirror connector
- Less likelyInternal fault of mirror control module B, often after water entry
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Mirror control module b
What each part of U044F means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4F | The exact fault in that area. |
What to do next
- Note U044F 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 U044F
What does U044F mean?
U044F means "Invalid Data Received From Mirror Control Module B". U044F is stored when a controller receives data from mirror control module B that it cannot use; U014D is lost contact, U0514 covers module A. It is a generic code, so it means the same on every make.
Is it safe to drive with U044F?
U044F does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U044F fail an emissions test?
U044F 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 U044F to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U044F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.