Lost Communication With Hands-Free Telephone Module
The U0188 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Hands-Free Telephone Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $500 (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
- Bluetooth phone connection not working
- Hands-free calling inoperative
- Voice command system for calls disabled
- Phone menu unavailable on infotainment screen
- Steering wheel phone buttons unresponsive
Probable Causes (Ranked by Likelihood)
- Failed Bluetooth or telematics module Very High
- Damaged wiring to hands-free module High
- Bluetooth antenna disconnected or damaged Moderate
- Software corruption requiring module update Moderate
Step-by-Step Diagnostic Procedure
-
Attempt to pair a phone manually through the settings menu
-
Try a system reset by disconnecting the battery for 10 minutes
-
Inspect the Bluetooth module (often behind the dashboard or in the trunk)
-
Check for software updates from the manufacturer
-
Verify the Bluetooth antenna connection
Frequently Asked Questions
Can I drive with code U0188?
Yes, safe to drive. Only the hands-free phone system is affected. Use a phone mount as a temporary alternative and avoid holding your phone while driving.
What causes U0188?
Usually a failed Bluetooth or telematics module. Software glitches can sometimes be fixed with a battery disconnect reset or manufacturer software update.
Is U0188 expensive to fix?
Typically $100 to $500. Try a battery disconnect reset first. Module replacement with reprogramming is on the higher end of the cost range.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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