U0317: Park Brake Module Software Mismatch
The U0317 code indicates that the Park Brake Control Module is incompatible with the vehicle's software. This network communication code (class U0) is triggered when the main control module detects that the park brake module has a software version, calibration, or hardware identification that does not match the expected configuration for the vehicle. This can occur after unprogrammed module replacements, incomplete software updates, or installation of a module from the wrong model or year.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Park brake module replaced without proper programming or calibration
- Interrupted or failed software update for the park brake module
- Installation of a park brake module from the wrong model, year, or specification
- Corrupted calibration data within the park brake module
- Flash memory failure in the park brake control module
- Module replacement without following post-installation configuration procedures
3. Symptoms You Will Notice
- Park brake warning light illuminated on the dashboard
- Park brake may not engage or disengage properly
- Reduced functionality of electronic park brake system
4. Step-by-Step Diagnosis
Use a scan tool to retrieve all stored codes and freeze frame data
Verify that the park brake module is the correct part for the vehicle's make, model, and year
Check for any pending software updates for the park brake module and perform if needed
Attempt to reprogram the park brake module with the correct software and calibration
If reprogramming fails, inspect module wiring and connectors for damage or corrosion
Replace the park brake module if it cannot be successfully programmed
5. Frequently Asked Questions
Is it safe to drive?▼
Driving with this code is not recommended as the park brake may malfunction, potentially causing unexpected engagement or failure to hold the vehicle on inclines. Have the issue diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether reprogramming alone is sufficient or if module replacement is needed. Labor rates and parts vary by vehicle.