Invalid Data Received From Electric Park Brake Module A
The U0457 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From Electric Park Brake Module A. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $250 - $900 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Park brake applying with wrong force
- Park brake warning light on
- Hill hold not engaging
- Auto hold feature disabled
Probable Causes (Ranked by Likelihood)
- Park brake module sending bad data Very High
- Park brake actuator calibration lost High
- CAN bus error Moderate
- Brake pad wear affecting actuator position Low
Step-by-Step Diagnostic Procedure
-
Scan park brake module for codes
-
Recalibrate park brake actuators
-
Check brake pad wear
-
Test CAN bus at park brake module
Frequently Asked Questions
Can I drive with U0457?
Short distances. Use wheel chocks when parked on hills.
What causes U0457?
Usually a calibration issue or worn brake pads affecting actuator position.
How much to fix?
Typically $250 to $900.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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