U0137

Lost Communication With Trailer Brake Control Module

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
No response from trailer brakes
Error message on the dashboard
Disabling Trailer Brake Assist
Trailer electrical problems

Causes

Open or short circuit in the module power supply circuit
Trailer brake control module malfunction
Problems with the wiring harness to the module
Connector pin corrosion
Software error in the ECU

How to Fix

Check fuses associated with the system
Inspect the wiring harness and connectors for damage.
Check power and ground on the module
Test the trailer brake control module
Reset the error and check for its reappearance

Related codes

U0121 U0140 U0155