What Does U0218 Mean?
The vehicle's control module network has lost communication with the rear right door switch module. This affects rear right door power window, lock, and related switch functions.
Common Causes
45%
Damaged or fractured wiring in rear right door jamb harness from door cycling
25%
Failed rear right door control module or switch electronics
15%
Corroded or water-damaged connector at door module inside door panel
10%
Network bus communication issue or short circuit on rear door circuit
5%
Power supply fault including blown fuse or open circuit to module
Diagnostic Steps
1
Step 1: Verify all door-related fuses and confirm power supply voltage at rear right door module connector
2
Step 2: Perform door harness wiggle test through jamb area while monitoring communication on scan tool to locate breaks
3
Step 3: Remove rear right door panel and inspect module connector for corrosion, moisture, or damaged terminals
4
Step 4: Measure and verify network bus signals at door module; check signal quality and voltage levels against specifications
5
Step 5: If all wiring, power, and network signals test good, replace rear right door control module and configure as necessary
Estimated Repair Cost
$130 - $580
Parts + labor, varies by vehicle and location
The vehicle's control module network has lost communication with the rear right door switch module. This affects rear right door power window, lock, and related switch functions.
The most common cause of U0218 (Lost Communication With "Door Switch D") is: Damaged or fractured wiring in rear right door jamb harness from door cycling
Typical repair costs for U0218 range from $130 to $580, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Very minor safety impact as driver master switch typically retains control of rear windows and locks. Rear right passengers cannot operate their window switch locally.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0218 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
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