U0140 on Dodge
Lost Communication with BCM
U0140 on Dodge vehicles indicates lost communication with bcm. Au7o has documented this code across 1 Dodge model — most commonly on Magnum. 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 Dodge range from $100 to $800, 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 Dodge by Model
Dodge Magnum(1 issue)
- Electrical System Flickering, Dash Light Failures, and Steering Column Module Issues2005-2008
The Dodge Magnum suffers from widespread electrical problems centered around the TIPM (Totally Integrated Power Module) and the steering column control module (clockspring). Symptoms include dash lights flickering or going completely dark while driving, headlights cutting out at night, loss of turn signals, wipers, horn, and cruise control all at once. The steering column module failure is particularly dangerous as it can disable multiple safety systems simultaneously. The TIPM relay failures can cause no-start conditions, fuel pump cutouts, and random electrical gremlins throughout the vehicle.
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What does U0140 mean on Dodge?▼
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 Dodge specifically, this code is documented across 1 model.
What causes U0140 on Dodge vehicles?▼
Common causes on Dodge: 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 Dodge?▼
Repair costs on Dodge range from $100 to $800, depending on the specific model and root cause.
Which Dodge models have U0140 documented?▼
Au7o has documented U0140 on 1 Dodge model: Magnum.