Dodge U1123
00 Lost Communication with Lin ECU 3, set in the BCM U113D-00 Lost Communication with Master Power Window Switch, set in the PDM Repair Pro
Quick answer
For applicable 2024–2026 Dodge Charger vehicles in the US, U1123-00 is documented in an official manufacturer communication as “Lost Communication with Lin ECU 3,” set in the BCM. The communication describes a condition in which doors do not function and also lists U113D-00 in the PDM. Service diagnosis is appropriate.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does U1123 mean?
For applicable 2024–2026 Dodge Charger vehicles in the US, U1123-00 is documented in an official manufacturer communication as “Lost Communication with Lin ECU 3,” set in the BCM. The communication describes a condition in which doors do not function and also lists U113D-00 in the PDM. Service diagnosis is appropriate.
2. Technical explanation
U1123-00 is a communication-related DTC set in the Body Control Module (BCM). Verified manufacturer-communication evidence identifies it as “Lost Communication with Lin ECU 3.” In the same documented condition, U113D-00, “Lost Communication with Master Power Window Switch,” may be set in the Passenger Door Module (PDM). The supplied evidence does not establish the underlying fault mechanism, wiring cause, component failure, or repair procedure.
3. What system is affected?
Body electronics: the BCM is identified as the module setting U1123-00. The related documented code U113D-00 is set in the PDM. The official communication concerns door operation.
4. How serious is this code?
Not yet established by verified evidence. The documented condition can involve doors that do not function, so prompt service assessment is appropriate.
5. Symptoms you may notice
- Doors do not function.
- U1123-00 may be stored in the BCM.
- U113D-00 may be stored in the PDM.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Arrange service diagnosis for the documented door-function concern.
- Provide the service facility with the stored DTCs and the official manufacturer communication reference.
- Do not attempt high-voltage-system repairs; the supplied evidence does not identify a high-voltage-system issue.
10. Step-by-step troubleshooting
- A technician may find U1123-00 in the BCM and U113D-00 in the PDM when the documented condition is present.
- Further diagnostic steps are not established by the supplied verified evidence.
11. When to contact service
Contact an authorized Dodge service facility if the doors do not function or these DTCs are present. Reference manufacturer communication S2408000016, Revision D or Revision E.
12. What the service center may check
- Confirm whether U1123-00 is present in the BCM.
- Confirm whether U113D-00 is present in the PDM.
- Assess the reported door-function condition. Additional service checks are not established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Dodge Charger · 2024–2026 · US
15. Related TSBs / service bulletins
- Official manufacturer communication S2408000016 REV.E, published March 31, 2026 (NHTSA document MC-11031243-0001): documents doors that do not function and may involve U1122-00 in the BCM, U1123-00 in the BCM, and U113D-00 in the PDM.
- Official manufacturer communication S2408000016 REV.D, published March 4, 2026 (NHTSA document MC-11030040-0001): documents the same listed condition and DTCs.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified applicability: Dodge Charger, model years 2024–2026, United States. Official NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2026/MC-11031243-0001.pdf and https://static.nhtsa.gov/odi/tsbs/2026/MC-11030040-0001.pdf
19. Frequently asked questions
What does U1123-00 mean?
Verified evidence identifies U1123-00 as “Lost Communication with Lin ECU 3,” set in the BCM.
What problem is documented with U1123-00?
The official manufacturer communication states that doors do not function and that a technician may find U1123-00 in the BCM.
Is U113D-00 related?
Yes. The same official communication lists U113D-00, “Lost Communication with Master Power Window Switch,” set in the PDM.
Does this evidence identify the repair?
No. A repair resolution is not yet established by the supplied verified evidence.