What Does U0516 Mean?
The body control or convenience module is receiving corrupted or implausible data from the door switch module designated as 'A', typically the driver's door. This affects communication about door ajar status, lock status, or window control inputs.
Common Causes
35%
Failed door switch module or integrated door control unit
30%
Corroded or damaged door harness connections, especially at hinge flex point
20%
Water intrusion in door module or switch assembly causing short circuits
10%
Poor ground connection at door module or body ground point
5%
CAN bus communication issue isolated to door network segment
Diagnostic Steps
1
Step 1: Operate all door switches (lock, window, mirror) while monitoring live data to identify which function generates invalid data
2
Step 2: Inspect door harness at hinge area for broken wires or chafing, particularly on high-mileage vehicles
3
Step 3: Remove door panel and check door control module connector for corrosion, water damage, or loose pins
4
Step 4: Test door module ground circuit for excessive resistance (should be less than 1 ohm to chassis)
5
Step 5: Verify power and communication signals at door module connector using wiring diagram and multimeter/oscilloscope
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The body control or convenience module is receiving corrupted or implausible data from the door switch module designated as 'A', typically the driver's door. This affects communication about door ajar status, lock status, or window control inputs.
The most common cause of U0516 (Invalid Data Received From "Door Switch A") is: Failed door switch module or integrated door control unit
Typical repair costs for U0516 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Door ajar warnings may be inaccurate, interior lights may malfunction, and power locks/windows could be affected. Does not prevent vehicle operation but may compromise security.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0516 to identify the root cause.
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Quick Info
Category
Network
System
Body Control Network
Difficulty
Type
Generic (SAE)
Recommended Tools
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