What Does U0217 Mean?
Communication with the rear left door switch module has been lost. This module manages power window, lock, and possibly child safety lock functions for the left rear door.
Common Causes
45%
Broken or damaged wiring in rear door jamb harness from repeated door movement
25%
Failed rear left door control module or switch assembly electronics
15%
Water damage or corrosion at door module connector inside door panel
10%
Network communication fault on LIN or CAN bus affecting rear door modules
5%
Blown fuse or loss of power supply to rear door module circuit
Diagnostic Steps
1
Step 1: Check all fuses related to rear door systems and verify battery voltage reaches door module
2
Step 2: Flex rear door harness through jamb while monitoring scan tool to identify intermittent wiring breaks
3
Step 3: Remove rear door panel and inspect door module connector for water intrusion, corrosion, or terminal damage
4
Step 4: Test network communication signals at door module connector with multimeter or scope; verify proper voltage levels
5
Step 5: Replace rear left door control module if wiring, power, and network signals are confirmed functional
Estimated Repair Cost
$130 - $580
Parts + labor, varies by vehicle and location
Communication with the rear left door switch module has been lost. This module manages power window, lock, and possibly child safety lock functions for the left rear door.
The most common cause of U0217 (Lost Communication With "Door Switch C") is: Broken or damaged wiring in rear door jamb harness from repeated door movement
Typical repair costs for U0217 range from $130 to $580, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Minimal safety impact as driver can typically control rear windows and locks from master switch. Rear passengers will not be able to operate window from that door switch.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0217 to identify the root cause.
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Quick Info
Category
Network
System
Body Control/Door System
Difficulty
Type
Generic (SAE)
Recommended Tools
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