U3003

Battery Voltage

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine Light Is On
Problems starting the engine
Reduced power of electrical equipment
Unstable engine operation
Low battery

Causes

Faulty generator
Worn out battery
Poor contacts or terminal corrosion
Wiring damage
Voltage regulator malfunction

How to Fix

Check battery voltage with engine off and running
Inspect terminals and contacts for corrosion
Check the condition of the alternator belt
Test the generator and voltage regulator
Replace battery if necessary

Related codes

U3000 U3001 U3002