U350D

Control Module Cooling Fan Circuit Low

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$33–111 (est.)

Symptoms

Control module overheating
Cooling fan does not work
Hot air from the ventilation system
Check Engine light comes on
Reduced engine performance

Causes

Broken wire in the fan circuit
Poor connection in connectors
Fan relay fault
Damaged cooling fan
Control module malfunction

How to Fix

Check the integrity of the fan circuit wires
Inspect connectors and connections for corrosion
Check fan relay operation
Test the cooling fan
Check the control module for faults

Related codes

U350C U350E U3510