What Does U0501 Mean?
The vehicle's network is receiving corrupted or out-of-range data from Door Control Module B (typically front passenger door). The module is communicating but the data content is invalid or implausible.
Common Causes
35%
Failed or internally corrupted door control module B
25%
Damaged or corroded wiring harness connector at passenger door module
20%
CAN network wiring fault or interference in passenger door circuit
12%
Insufficient power supply or ground fault at door control module
8%
Software calibration issue or module requires initialization after replacement
Diagnostic Steps
1
Step 1: Verify power and ground at door control module B connector using multimeter (12V reference and solid ground)
2
Step 2: Inspect passenger door harness connector for moisture, corrosion, or damaged terminals; clean or repair
3
Step 3: Monitor CAN bus signals on scan tool while operating passenger door functions to identify data anomalies
4
Step 4: Check for physical damage to door harness from door opening/closing or window regulator interference
5
Step 5: Swap door control module B with another door module if possible to confirm module fault; replace if defective
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
The vehicle's network is receiving corrupted or out-of-range data from Door Control Module B (typically front passenger door). The module is communicating but the data content is invalid or implausible.
The most common cause of U0501 (Invalid Data Received From "Door Control Module B") is: Failed or internally corrupted door control module B
Typical repair costs for U0501 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Passenger door functions (locks, windows, mirrors) may malfunction. Does not affect vehicle drivability but may impact passenger safety and security features.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0501 to identify the root cause.
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Quick Info
Category
Network
System
Body Control Network / Door Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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