U045E code meaning
Invalid Data Received From Automated Driving System Control Module B
What U045E means
Control module B is the second unit of a split automated driving computer, and the two halves check each other. Stellantis documents U045E in STAR case S2508000095 for 2024-26 Jeep Wagoneer and Grand Wagoneer: the CADM and the global navigation and motion module store U045E-00 next to U015D-00, Ethernet link errors and time synchronisation faults, and the freeze-frame data name failed message checks on two internal processor paths. Replaced modules showed no defect; taut Ethernet cables had strained the plugs. Technicians inspect plugs and pins, replace the harness without splicing and set clip C121 to the specified distances. U015D would mean B is silent, U045D covers module A. Customers see a blind spot alert unavailable message, lit mirror warning lamps and switched-off assistance; this case names no MIL.
U045E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U045E
- Blind spot alert unavailable message
- Blind spot lamps in the mirrors stay lit
- Driver assistance features disabled
Common causes of U045E
- Most likelyEthernet cable routed too tight, straining plugs and pins at the ADAS modules
- PossibleHarness clip at the ADAS decision module outside the specified distance
- Less likelyInternal fault of ADAS control module B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ads module b
What each part of U045E means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5E | The exact fault in that area. |
What to do next
- Note U045E 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 U045E
What does U045E mean?
U045E means "Invalid Data Received From Automated Driving System Control Module B". Control module B is the second unit of a split automated driving computer, and the two halves check each other. It is a generic code, so it means the same on every make.
Is it safe to drive with U045E?
Drive gently and only to a workshop. With U045E the car can go into limp mode (reduced power) to protect itself.
Will U045E fail an emissions test?
U045E 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 U045E to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U045E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.