What Does U0545 Mean?
The control module is receiving corrupted or implausible data from the Running Board Control Module, which manages power-deployable side steps. This indicates a network communication data quality issue affecting the automatic running board deployment system.
Common Causes
40%
Wiring harness damage, corrosion, or connector issues at running board module or motors
30%
Faulty running board control module sending incorrect position or limit switch data
15%
Defective position sensors or limit switches in running board mechanism
10%
Mechanical binding or obstruction causing motor feedback errors
5%
Poor power supply or ground connection to running board module
Diagnostic Steps
1
Step 1: Manually operate running boards (if possible) and observe deployment/retraction for binding or unusual noises
2
Step 2: Inspect running board mechanisms for dirt, ice, road debris, or physical damage preventing smooth operation
3
Step 3: Check wiring harness routing under vehicle for damage from road debris, check connectors for corrosion
4
Step 4: Monitor live data from running board module to identify which position sensor or motor is reporting invalid data
5
Step 5: Test voltage supply to running board module (should have stable 12V) and verify ground circuit integrity
Estimated Repair Cost
$150 - $1,000
Parts + labor, varies by vehicle and location
The control module is receiving corrupted or implausible data from the Running Board Control Module, which manages power-deployable side steps. This indicates a network communication data quality issue affecting the automatic running board deployment system.
The most common cause of U0545 (Invalid Data Received From Running Board Control Module) is: Wiring harness damage, corrosion, or connector issues at running board module or motors
Typical repair costs for U0545 range from $150 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Power running boards may not deploy/retract properly, potentially creating a tripping hazard if stuck in extended position. Vehicle remains fully drivable but entry/exit convenience is affected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0545 to identify the root cause.
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Quick Info
Category
Network
System
Body Control / Power Running Boards
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
