Lost Communication With Park Brake Control Module
The U0159 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Park Brake Control Module. This is a critical severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $800 (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 warning light illuminated
- Electronic parking brake inoperative
- Multiple warning lights on dashboard
- Vehicle may not shift out of park
- Hill start assist not functioning
Probable Causes (Ranked by Likelihood)
- Faulty park brake control module Very High
- Damaged CAN bus wiring to park brake module High
- Corroded connector at park brake module Moderate
- Low battery voltage causing module communication loss Low
Step-by-Step Diagnostic Procedure
-
Check for battery voltage above 12.4V with engine off
-
Inspect wiring harness and connector at the park brake control module
-
Measure CAN bus signals at the park brake module connector
-
Check for water intrusion near the rear of the vehicle where module is mounted
-
Attempt to communicate directly with the park brake module using a scan tool
Frequently Asked Questions
Can I drive with code U0159?
You can drive short distances but the electronic parking brake will not function. Avoid hills and park on flat surfaces until repaired.
What causes U0159?
The most common cause is a failed park brake control module or damaged wiring. Water intrusion at the rear-mounted module connector is also a frequent culprit.
Is U0159 expensive to fix?
Repair costs typically range from $200 to $800. Wiring repairs are less expensive while module replacement with programming is on the higher end.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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