U0633

Lost Communication With Fan 2

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Engine overheating
The second cooling fan does not work
Check Engine Light Is On
Reduced engine performance

Causes

Open or short circuit in wiring
Fan relay fault
Problems with the engine control unit
Malfunction of the fan itself

How to Fix

Check the integrity of the wiring to the fan
Check fan relay operation
Check fan circuit fuses
Check the operation of the fan
Check control signals from ECU

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