U0139

Lost Communication With Suspension Control Module B

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine Light Is On
Suspension operates in emergency mode
Deterioration in ride comfort
Lack of response to suspension adjustments
Error message on the dashboard

Causes

Open or short circuit in the communication circuit
Suspension control module B malfunction
Module power problems
Corrosion or oxidation of contacts
Wiring Harness Problems

How to Fix

Check the integrity of the communication circuit between the ECU and the module
Check power supply and grounding of the module
Inspect contacts for corrosion
Check wiring harness for damage
If necessary, replace suspension control module B

Related codes

U0138 U0140 U0121