U02AB

Lost Communication With Vehicle Thermal Management Control Module

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Incorrect operation of the cooling system
Problems with interior heating
Check Engine light comes on
Reduced engine efficiency
Errors in other related systems

Causes

Open or short circuit in the communication circuit
Poor contact in the module connector
Thermal control module malfunction
Module power problems
ECU software error

How to Fix

Check the integrity of the wiring harness to the module
Inspect and clean the contacts in the connectors
Check the power supply and ground of the module
Test the thermoregulation control module
Update ECU software if necessary

Related codes

U02AA U02AC U02AD