U0140

Lost Communication with Body Control Module

Severity: Medium Network/Communication Generic OBD-II Code Est. Repair: $50 - $900

Schedule diagnosis soon. Continued driving may worsen the issue.

Quick Answer

U0140 means “Lost Communication with Body Control Module.” Severity: Medium. Estimated repair cost: $50 - $900. Most common sign: Multiple body electrical symptoms (locks, windows, lights) alongside the CEL.

What Does U0140 Mean?

Another module reports it can't communicate with the BCM.

Common Symptoms

Multiple body electrical symptoms (locks, windows, lights) alongside the CEL

Possible Causes

Blown BCM fuse
Wiring fault
Failed BCM

How to Fix U0140 – Repair Guide

Check BCM fuse and power/ground
Inspect wiring
Replace BCM if confirmed
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Budgeting for This Repair?

A typical U0140 repair runs about $50 - $900. If you'd rather spread the cost over time, estimate the payment with our free sister tool: Car Finance Calculator (50-state sales tax, trade-in equity, full amortization).

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Disclaimer: Information is for educational reference only and does not replace professional diagnosis. Actual causes and costs vary by vehicle make, model, year and condition. Always verify with a qualified technician.