What Does U0544 Mean?
The control module is receiving corrupted or implausible data from Parking Assist Control Module B, which manages rear or side parking sensors and alerts. This represents a network communication data quality issue with the secondary parking assist system.
Common Causes
35%
Wiring harness damage, corrosion, or connector issues at parking assist module or sensors
25%
Faulty parking assist control module B sending incorrect sensor data
20%
Defective ultrasonic parking sensor(s) providing invalid distance readings
12%
Water intrusion, ice buildup, or physical damage to parking sensors in bumper
8%
CAN bus communication issue or poor module ground connection
Diagnostic Steps
1
Step 1: Test parking assist system operation in reverse and low speeds, listen for sensor clicking sounds
2
Step 2: Visually inspect all parking sensors for physical damage, dirt buildup, ice, or water in connectors
3
Step 3: Clean all parking sensors thoroughly and verify proper mounting in bumper (flush with surface)
4
Step 4: Monitor live data from parking assist module B to identify which sensor is reporting invalid distances
5
Step 5: Test individual sensor resistance values (typically 1-2k ohms) and perform sensor output voltage tests
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The control module is receiving corrupted or implausible data from Parking Assist Control Module B, which manages rear or side parking sensors and alerts. This represents a network communication data quality issue with the secondary parking assist system.
The most common cause of U0544 (Invalid Data Received From Parking Assist Control Module "B") is: Wiring harness damage, corrosion, or connector issues at parking assist module or sensors
Typical repair costs for U0544 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Parking assist alerts may be inoperative, inaccurate, or give false warnings. Driver must rely on mirrors and direct observation when parking. No impact on vehicle drivability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0544 to identify the root cause.
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Quick Info
Category
Network
System
Driver Assistance / Parking Aid System
Difficulty
Type
Generic (SAE)
Recommended Tools
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