EV Diagnostics
Verified EV diagnostic knowledge page

Jeep U1122

00 Lost Communication with Lin ECU 2 U1123-00 Lost Communication with Lin ECU 3 U113D-00 Lost Communication with Master Power Window Switch

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not yet established by verified evidence. However, an authorized Jeep service facility can evaluate the documented inoperative-window-switch condition and related DTCs.
Confidence95%

Quick answer

For certain 2023–2026 Jeep Grand Cherokee and Wagoneer vehicles in the US, U1122-00 is documented with U1123-00 and U113D-00 in an official manufacturer communication concerning inoperative front-passenger and/or rear-door window switches.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does U1122 mean?

For certain 2023–2026 Jeep Grand Cherokee and Wagoneer vehicles in the US, U1122-00 is documented with U1123-00 and U113D-00 in an official manufacturer communication concerning inoperative front-passenger and/or rear-door window switches.

2. Technical explanation

U1122-00 means “Lost Communication with LIN ECU 2.” The supplied official manufacturer communications also identify U1123-00, “Lost Communication with LIN ECU 3,” and U113D-00, “Lost Communication with Master Power Window Switch,” as DTCs a technician may find for this condition. The codes are identified as set in the BCM in the supplied evidence.

3. What system is affected?

Power-window switch/LIN communication, with the BCM identified in the supplied evidence.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Front-passenger window switch may not function.
  • Either rear-door window switch may not function.
  • The front-passenger and both rear-door window switches may not function.
  • The front-passenger, rear-right, and/or rear-left window switches may not function.

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 diagnosis by an authorized Jeep service facility if the documented window-switch concern is present.
  • Use the official manufacturer communication as a reference when discussing U1122-00, U1123-00, and U113D-00 with service personnel.

10. Step-by-step troubleshooting

  1. Confirm whether the front-passenger and rear-door window switches operate.
  2. Have a qualified technician check for U1122-00, U1123-00, and U113D-00 in the BCM.
  3. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Service need is not yet established by verified evidence. However, an authorized Jeep service facility can evaluate the documented inoperative-window-switch condition and related DTCs.

12. What the service center may check

  • Check for U1122-00 Lost Communication with LIN ECU 2 in the BCM.
  • Check for U1123-00 Lost Communication with LIN ECU 3 in the BCM.
  • Check for U113D-00 Lost Communication with Master Power Window Switch in the BCM.
  • Verify operation of the front-passenger and rear-door window switches.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Jeep manufacturer communication S2408000016 REV.E, published March 31, 2026; NHTSA document MC-11031243-0001: https://static.nhtsa.gov/odi/tsbs/2026/MC-11031243-0001.pdf
  • Jeep manufacturer communication S2408000016 REV.D, published March 4, 2026; NHTSA document MC-11030040-0001: https://static.nhtsa.gov/odi/tsbs/2026/MC-11030040-0001.pdf
  • Jeep manufacturer communication S2408000016 REV.C, published August 6, 2025; NHTSA document MC-11021847-0001: https://static.nhtsa.gov/odi/tsbs/2025/MC-11021847-0001.pdf
  • Jeep manufacturer communication S2408000016 REV.B, published October 11, 2024; NHTSA document MC-11008907-0001: https://static.nhtsa.gov/odi/tsbs/2024/MC-11008907-0001.pdf
  • Jeep manufacturer communication S2408000016 REV.A, published July 26, 2024; NHTSA document MC-11005275-0001: https://static.nhtsa.gov/odi/tsbs/2024/MC-11005275-0001.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified applicability: US-market 2023–2026 Jeep Grand Cherokee and 2023–2026 Jeep Wagoneer. The supplied applicability data also includes overlapping 2023–2024 records for both models. Official evidence is an NHTSA-hosted Jeep manufacturer communication, S2408000016, in revisions A through E.

19. Frequently asked questions

What does U1122-00 mean?

It means “Lost Communication with LIN ECU 2.”

What other codes are documented with U1122-00?

The supplied official manufacturer communications list U1123-00 Lost Communication with LIN ECU 3 and U113D-00 Lost Communication with Master Power Window Switch.

What vehicle issue is documented?

The official communications document that the front-passenger and/or rear-door window switches may not function.

Which vehicles are covered by the supplied evidence?

US-market 2023–2026 Jeep Grand Cherokee and 2023–2026 Jeep Wagoneer vehicles.

Is this a recall?

Not yet established by verified evidence.

20. Sources & verification

Verified
Jeep U1122: 00 Lost Communication with Lin ECU 2 U1123-00 Lost… | EV Diagnostics