P0A1A

Generator Control Module

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Unstable voltage in the on-board network
Low battery
Problems starting the engine
Electronic systems blinking or turning off

Causes

Generator control module malfunction
Damage to module wiring or connectors
Problems with the generator
Short circuit in control circuit
Module software error

How to Fix

Check the condition of the wiring and connectors of the control module
Test the operation of the generator
Check voltage and signals on the control module
Replace generator control module if necessary
Update module software (if available)

Related codes

P0A1B P0A1C P0620