U0101 on Jeep vehicles A module has stopped hearing from the transmission control module
U0101 is named on 11 Jeep model years (2022–2026): 60 manufacturer filings and 2 owner reports in NHTSA’s files, across Grand Cherokee, Grand Wagoneer, Wagoneer, Wrangler.
Which Jeep model years name U0101
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2025 Jeep Grand Cherokee | Power Train | 10 | — |
| 2024 Jeep Grand Cherokee | Power Train | 10 | — |
| 2023 Jeep Grand Cherokee | Power Train | 7 | — |
| 2025 Jeep Grand Wagoneer | Power Train | 6 | — |
| 2025 Jeep Wagoneer | Power Train | 6 | — |
| 2024 Jeep Grand Wagoneer | Power Train | 6 | — |
| 2024 Jeep Wagoneer | Power Train | 6 | — |
| 2026 Jeep Grand Cherokee | Power Train | 3 | — |
| 2023 Jeep Grand Wagoneer | Power Train | 3 | — |
| 2023 Jeep Wagoneer | Power Train | 3 | — |
| 2022 Jeep Wrangler | Electrical System | — | 2 |
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.
What Jeep owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
Car had to be towed to dealership a few days after services were completed, and was diagnosed at dealership, with an offline TCM, throwing a U0101 code
Jeep filings that name U0101
Source: NHTSA manufacturer communicationsBulletins and campaigns Jeep filed with NHTSA whose summary names U0101. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 21-016-25 REV. A Service bulletin2025-05-18 · Power Train
- "Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0101 - Lost Communication With The Transmission Control Module (TCM). ● U0402 - Implausible Data Received From TCM. ● U0418 - Implausible Data Received From Brake System Control Module 1. Customers may al
- 21-016-25 REV. B Service bulletin2025-08-07 · Power Train
- Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0101 - Lost Communication With The Transmission Control Module (TCM). ● U0402 - Implausible Data Received From TCM. ● U0418 - Implausible Data Received From Brake System Control Module 1. Customers may als
- 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
- 21-016-25 REV. C Service bulletin2025-08-15 · Power Train
- Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0101 - Lost Communication With The Transmission Control Module (TCM). ● U0402 - Implausible Data Received From TCM. ● U0418 - Implausible Data Received From Brake System Control Module 1. Customers may als
- 21-016-25 Service bulletin2025-02-14 · Power Train
- "Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0101 - Lost Communication With The Transmission Control Module (TCM). ● U0402 - Implausible Data Received From TCM. ● U0418 - Implausible Data Received From Brake System Control Module 1. Customers may a
- 21-016-25 Service bulletin2025-02-14 · Power Train
- "Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0101 - Lost Communication With The Transmission Control Module (TCM). ● U0402 - Implausible Data Received From TCM. ● U0418 - Implausible Data Received From Brake System Control Module 1. Customers may a
What U0101 means
Source: SAE J2012 / OBD-IIA module has stopped hearing from the transmission control module.
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 U0101 a known problem on Jeep vehicles?
It is a documented one: NHTSA's files hold 60 manufacturer filings and 2 owner reports naming U0101 on 11 Jeep model years (2022–2026). 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 U0101 appear on most?
2025 Grand Cherokee (10 documents), 2024 Grand Cherokee (10 documents), 2023 Grand Cherokee (7 documents).
Does U0101 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.