U042E

Invalid Data Received From Generator A 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
Unstable operation of the charging system
Reduced voltage in the on-board network
Problems starting the engine
Malfunctions of electronic systems

Causes

Generator malfunction
Damage to the wiring harness to the generator
Problems with the generator control module
Corrosion or poor contact in connectors
Software error in the ECU

How to Fix

Check the condition of the generator and its drive belt
Inspect the alternator wiring harness and connectors
Check battery voltage
Scan the generator control module for errors
Update ECU software if necessary

Related codes

U042F U0430 U0431