Code Definition

U11E3 — TCM Lost Communication With ESM on D-PT CAN

System: Network Communication  |  Type: Manufacturer-Specific  |  Make: Jeep

About U11E3

U11E3 is a manufacturer-specific network communication diagnostic trouble code recorded for Jeep vehicles. It belongs to the U-prefix family of codes, which covers inter-module network communication (CAN, LIN, FlexRay, or similar) faults.

Scanning & clearing: Network (U) codes report communication faults between modules. When diagnosing U-codes, checking the vehicle's CAN bus integrity, supply/ground at each module, and reading all modules for related faults is usually the first step.

U11E3 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

On this Chrysler group vehicle, the Transmission Control Module communicates with the Electronic Shift Module, or ESM, over the Diagnostic Powertrain CAN bus. The ESM is the shift by wire shifter assembly that tells the TCM the selected gear range, since there is no mechanical cable to the transmission. DTC U11E3 sets when the TCM stops receiving valid messages from the ESM over that CAN bus for a calibrated period. With communication lost the transmission cannot confirm the driver selected range, so it may default to a safe mode such as park or neutral, illuminate warning lights, and prevent ...

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