What Does U0216 Mean?
The vehicle's network has lost communication with the passenger front door switch module. This controls the power windows, locks, and other functions specific to the passenger door.
Common Causes
45%
Damaged or broken wiring in passenger door jamb harness from door flex cycles
25%
Failed passenger door control module or switch assembly
15%
Corroded connector at door module due to water leaks into door panel
10%
Network bus fault or short affecting passenger side body control network
5%
Power supply issue including blown fuse or open circuit to door module
Diagnostic Steps
1
Step 1: Verify all door system fuses are intact and check for power at passenger door module connector
2
Step 2: Perform wiggle test on passenger door harness through jamb area while monitoring communication status on scan tool
3
Step 3: Remove passenger door panel and inspect module and switch connectors for water damage, corrosion, or loose terminals
4
Step 4: Measure network bus voltage and signals at door module connector; compare to known good values
5
Step 5: Replace passenger door switch module or control unit if power and communications wiring are confirmed good
Estimated Repair Cost
$140 - $600
Parts + labor, varies by vehicle and location
The vehicle's network has lost communication with the passenger front door switch module. This controls the power windows, locks, and other functions specific to the passenger door.
The most common cause of U0216 (Lost Communication With "Door Switch B") is: Damaged or broken wiring in passenger door jamb harness from door flex cycles
Typical repair costs for U0216 range from $140 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Minor impact on safety as driver controls typically remain functional. Passenger window and lock operation from that door will be inoperative, but can usually be controlled from driver's master switch.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0216 to identify the root cause.
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Quick Info
Category
Network
System
Body Control/Door System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
