P0562

System Voltage Low

Car Fault Codes Powertrain

Can you still drive? With care, short trips only

Typical cost Under SAR 2,000

What it means

The engine computer monitors the supply voltage and found it below the normal level for a set period. The cause is usually weak charging from the alternator, a worn-out battery or loose connections.

Symptoms5

Battery or check engine light on.
Dim or flickering lights.
Slow cranking when starting.
Random electrical glitches.
Engine stalling if voltage drops far enough.

Possible causes6

Alternator not charging sufficiently.
Weak or failed battery.
Corroded or loose battery terminals.
Loose or slipping alternator belt.
Damaged ground strap between engine and body.
Excess electrical load from aftermarket accessories.

How to diagnose and fix6

Measure battery voltage with the engine off and then running; running voltage should be clearly higher.
Clean and tighten the battery terminals.
Inspect and tension the alternator belt.
Test the battery with a battery tester.
Test the alternator and replace it if it is not charging.
Inspect and clean the ground straps.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

Cleaning terminals or a new battery is usually in the first tier, while an alternator may reach the second.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.

Frequently asked questions

Can I drive with the battery light on?

Only a short distance, since the car is running on battery reserve and may shut off suddenly. Turn off the air conditioning and non-essential loads and head straight to a workshop.

Can I check the battery myself?

Measuring voltage with a simple meter is safe, but never bridge the terminals with a metal tool, keep flames away from the battery and wear eye protection.

This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

Report a mistake

Spotted something inaccurate? Tell us and we will review and correct it.