U0101 on Chrysler
Lost Communication with TCM
U0101 on Chrysler vehicles indicates lost communication with tcm. Au7o has documented this code across 1 Chrysler model — most commonly on Town & Country. This is a network communication code meaning a control module on the vehicle's data bus has lost communication with the Transmission Control Module (TCM). Modern vehicles use a shared data network (commonly CAN bus) so modules can exchange information; when the TCM stops responding or its messages disappear, other modules set this code. Because the transmission relies on this communication to shift properly, the vehicle may go into 'limp' mode, hold one gear, or refuse to shift normally. It generally indicates a wiring, power, ground, or connector problem on the network — or a failed TCM itself — rather than an internal mechanical transmission fault. Typical repair costs on Chrysler range from $200 to $800, depending on the specific model and root cause.
Common Causes of U0101
- •Damaged, corroded, or loose TCM wiring or connectors
- •Open or short in the CAN bus data wiring
- •Blown fuse or lost power/ground to the TCM
- •Corrosion or water intrusion at the TCM connector
- •Faulty Transmission Control Module
- •Another faulty module dragging down the data bus
- •Poor ground connection in the network
U0101 on Chrysler by Model
Chrysler Town & Country(1 issue)
- Ignition Switch and SKREEM Module Failure2008-2016
The ignition switch and SKREEM (Sentry Key Remote Entry Module) fail, preventing the vehicle from starting or causing intermittent no-start conditions. The SKREEM module reads the transponder in the key and communicates with the PCM. Failure causes 'no bus' communication errors.
Looking for U0101 on a different make?
View U0101 across all makes →Frequently Asked Questions
What does U0101 mean on Chrysler?▼
U0101 stands for "Lost Communication with TCM." This is a network communication code meaning a control module on the vehicle's data bus has lost communication with the Transmission Control Module (TCM). Modern vehicles use a shared data network (commonly CAN bus) so modules can exchange information; when the TCM stops responding or its messages disappear, other modules set this code. Because the transmission relies on this communication to shift properly, the vehicle may go into 'limp' mode, hold one gear, or refuse to shift normally. It generally indicates a wiring, power, ground, or connector problem on the network — or a failed TCM itself — rather than an internal mechanical transmission fault. On Chrysler specifically, this code is documented across 1 model.
What causes U0101 on Chrysler vehicles?▼
Common causes on Chrysler: Damaged, corroded, or loose TCM wiring or connectors, Open or short in the CAN bus data wiring, Blown fuse or lost power/ground to the TCM, Corrosion or water intrusion at the TCM connector, Faulty Transmission Control Module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0101 on a Chrysler?▼
Repair costs on Chrysler range from $200 to $800, depending on the specific model and root cause.
Which Chrysler models have U0101 documented?▼
Au7o has documented U0101 on 1 Chrysler model: Town & Country.