What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
U0101Lost Communication With The Transmission Control Module (TCM)U0101-00Lost Communication With TCMU0101Lost Communication With The Transmission Control Module (TCM)U0101Lost Communication With TCMView all · Manufacturer wording →
Manufacturer communications
87Original wording in English
ISUZU
Reported code forms U0101
INFORMATION BULLETIN: TECHNICIANS MAY ENCOUNTER DTC U0101 (00) LOST COMMUNICATION WITH TRANSMISSION CONTROL MODULE (TCM) STORED IN THE ELECTRONIC HYDRAULIC CONTROL UNIT (EHCU) AS A HISTORY CODE. WHEN AN IDLE SHUTDOWN…
HYUNDAI
Reported code forms U010187
Certain Palisade Hybrid (LX3 HEV) vehicles may illuminate the Malfunction Indicator Lamp (MIL) and display a false “Check Hybrid System” warning message after use of Bluelink Remote Start following extended parking…
HYUNDAI
Reported code forms U010187
Certain Palisade Hybrid (LX3 HEV) vehicles may illuminate the Malfunction Indicator Lamp (MIL) and display a false “Check Hybrid System” warning message after use of Bluelink Remote Start following extended parking…
JEEP
Reported code forms U0101
The service shifter message comes on in the cluster and the lever gets stuck in park "P" and it can be present the follwoing DTC: - U11E3 - TCM Lost communication with ESM on D-PT CAN - U0103 - Lost communication with…
JEEP
Reported code forms U0101-00
Not applicable to vehicles built for US market. Multiple Systems Repair Bundle Campaign Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the…
JEEP, RAM
Reported code forms U0101
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…
Check vehicle applicability
537A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A3 | 2026 |
| Audi | A3 | 2025 |
| Audi | A3 | 2024 |
| Audi | A3 | 2023 |
| Audi | A3 | 2022 |
| Audi | A4 | 2010 |
| Audi | A4 | 2009 |
| Audi | A4 ALLROAD | 2014 |
| Audi | A4 ALLROAD | 2013 |
| Audi | A4 AVANT | 2012 |
| Audi | A4 AVANT | 2011 |
| Audi | A5 | 2014 |
Historical records · 1 · Historical vehicle association; OBD-II compatibility is not established by this record.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.