U0129 on Jeep vehicles
U0129 is named on 5 Jeep model years (2024–2026): 9 manufacturer filings and 0 owner reports in NHTSA’s files, across Grand Cherokee, Grand Wagoneer, Wagoneer.
Which Jeep model years name U0129
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2026 Jeep Grand Cherokee | Power Train | 3 | — |
| 2025 Jeep Grand Cherokee | Power Train | 3 | — |
| 2025 Jeep Grand Wagoneer | Power Train | 1 | — |
| 2025 Jeep Wagoneer | Power Train | 1 | — |
| 2024 Jeep Grand Wagoneer | Power Train | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Jeep filings that name U0129
Source: NHTSA manufacturer communicationsBulletins and campaigns Jeep filed with NHTSA whose summary names U0129. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 9100641 Service bulletin2025-08-05 · Power Train
- Symptoms/Condition: Shifter reports loss communication AND NO OTHER MODULES report the condition. Diagnostic: Please make sure ONLY shifter reports loss communication. If there are other modules reporting loss communication, then follow the existing service procedure Repair Procedure: 1. Verify Complaint - ESM reports a Loss of Communication (LOC) DTC, but no other modules do. - If multiple module
What U0129 means
Source: SAE J2012 / OBD-IIU0129 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. The record above is what Jeep and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs U0129 a known problem on Jeep vehicles?
It is a documented one: NHTSA's files hold 9 manufacturer filings and 0 owner reports naming U0129 on 5 Jeep model years (2024–2026). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Jeep models does U0129 appear on most?
2026 Grand Cherokee (3 documents), 2025 Grand Cherokee (3 documents), 2025 Grand Wagoneer (1 document).
Does U0129 on a Jeep mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.