Invalid Data Received From Body Control Module A
The U0419 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From Body Control Module A. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $200 - $800 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Random electrical issues
- Lights turning on or off unexpectedly
- Power windows operating intermittently
- Door locks acting erratically
- Dashboard warning lights flickering
Probable Causes (Ranked by Likelihood)
- BCM internal failure Very High
- CAN bus data corruption High
- BCM connector corrosion Moderate
- 12V battery voltage instability Low
Step-by-Step Diagnostic Procedure
-
Test 12V battery and charging system
-
Scan BCM for internal codes
-
Inspect BCM connector for corrosion
-
Check CAN bus signal quality
Frequently Asked Questions
Can I drive with U0419?
Yes, but electrical features may behave erratically.
What causes U0419?
Usually BCM internal failure or corroded connectors. Low battery voltage is also a trigger.
How much does U0419 cost to fix?
Typically $200 to $800.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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