C0109

Power Supply Voltage Failure

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

ABS light is on
ABS system does not work
Unstable operation of the brake system

Causes

Battery fault
Problems with the generator
Broken or damaged wiring harness
Contact corrosion

How to Fix

Check battery voltage
Check generator operation
Inspect the wiring harness for damage
Check contacts for corrosion

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