U0140 on Kia
Lost Communication with BCM
U0140 on Kia vehicles indicates lost communication with bcm. Au7o has documented this code across 1 Kia model — most commonly on Telluride. U0140 is a network communication code meaning a module has lost communication with the body control module (BCM) over the vehicle's data bus. The BCM oversees many body and convenience functions — lighting, door locks, windows, wipers, anti-theft, and gateway communications — so losing contact with it can cause a wide range of seemingly unrelated electrical problems and warning lights. This is typically a wiring, connector, power/ground, or bus fault, or a failure of the BCM itself. Because the BCM often acts as a communication hub, this code can appear alongside other 'lost communication' codes. Typical repair costs on Kia range from $200 to $1,200, depending on the specific model and root cause.
Common Causes of U0140
- •Loss of power or ground to the BCM
- •CAN/data bus wiring damage, short, or open circuit
- •Corroded, loose, or damaged BCM connectors
- •Blown fuse feeding the BCM
- •Failed body control module
- •Water intrusion or corrosion in the harness
- •Another module faulting the shared data bus
U0140 on Kia by Model
Kia Telluride(1 issue)
- Parasitic 12V Battery Drain from Telematics Modem / Intelligent Battery Unit (Repeat No-Start)2020-2025
Tellurides repeatedly go dead overnight or after a few days parked, with owners jump-starting and replacing perfectly good batteries only to have the problem return. The Telluride's always-on cellular telematics modem (Kia Access / UVO remote start and remote climate) never fully sleeps, and the Intelligent Battery Unit (IBU) — the module that manages charge state and load-shedding — is the second common culprit; a failing IBU or a module that will not enter sleep leaves a parasitic draw well above the ~30-50 mA target. Contributing triggers reported across the owner community include the key fob left within proximity range of the vehicle (which keeps the smart-key ECU and body modules awake), and heavy use of remote-start via the app. Dealers frequently fail to reproduce this because the draw only appears after the vehicle should have entered deep sleep — several owners report the dealership needing a month to catch it.
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View U0140 across all makes →Frequently Asked Questions
What does U0140 mean on Kia?▼
U0140 stands for "Lost Communication with BCM." U0140 is a network communication code meaning a module has lost communication with the body control module (BCM) over the vehicle's data bus. The BCM oversees many body and convenience functions — lighting, door locks, windows, wipers, anti-theft, and gateway communications — so losing contact with it can cause a wide range of seemingly unrelated electrical problems and warning lights. This is typically a wiring, connector, power/ground, or bus fault, or a failure of the BCM itself. Because the BCM often acts as a communication hub, this code can appear alongside other 'lost communication' codes. On Kia specifically, this code is documented across 1 model.
What causes U0140 on Kia vehicles?▼
Common causes on Kia: Loss of power or ground to the BCM, CAN/data bus wiring damage, short, or open circuit, Corroded, loose, or damaged BCM connectors, Blown fuse feeding the BCM, Failed body control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0140 on a Kia?▼
Repair costs on Kia range from $200 to $1,200, depending on the specific model and root cause.
Which Kia models have U0140 documented?▼
Au7o has documented U0140 on 1 Kia model: Telluride.