U0140Medium urgency
Lost Communication with Body Control Module
Network · CAN Bus
⚠️ Multiple body electrical systems are likely inoperative. Safe to drive. Service within a few days.
What this means
The BCM has lost CAN bus communication. Interior lighting, door locks, windows, wipers, and keyless entry may all be inoperative.
Likely causes
- Failed BCMMost common
- BCM power or ground faultMost common
- CAN bus wiring fault to BCMCommon
Estimated repair cost
BCM replacement and programming$200 – $800
BCM power/ground repair$80 – $250
CAN bus wiring repair$150 – $500
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Frequently asked questions about U0140
What does U0140 mean?
The BCM has lost CAN bus communication. Interior lighting, door locks, windows, wipers, and keyless entry may all be inoperative.
Is U0140 serious?
Multiple body electrical systems are likely inoperative. Safe to drive. Service within a few days.
How much does it cost to fix U0140?
Repair costs for U0140 range from $200 – $800 depending on the root cause and your vehicle.
Can I drive with U0140?
You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.