P0562 code: System Voltage Low
P0562 means system Voltage Low. The code says where to look, not what failed — the fix depends on which cause your car actually has.
What P0562 means
P0562 means the car's electrical system voltage is running too low — the charging system isn't keeping up. The usual cause is a failing alternator, but a weak or dying battery, a loose or worn drive belt, or corroded battery cables and ground connections can all cause it. Low system voltage can make the engine run poorly and, if it's the charging system, can leave you stranded when the battery finally drains. It's worth testing the charging system promptly.
P0562 symptoms
- Battery or charging warning light
- Dim headlights or flickering dash lights
- Slow cranking or a no-start
- Electrical accessories acting weak or erratic
- Check-engine light
What it costs to fix P0562
Typical range: $50–$800 · about ~0.3–2.5 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Battery | $100–$300 | ~0.2–0.5 hrs |
| Alternator | $150–$600 | ~0.5–2.5 hrs |
| Belt / cable / ground repair | $10–$100 | ~0.3–1 hrs |
A corroded cable or loose ground is the cheap, easy-to-miss cause worth checking first. A battery is mid-range; an alternator is the expensive end and labor varies a lot by how buried it is on the engine.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0562 for my exact vehicle →
How to fix P0562
Moderate — doable at home with common tools and patience
- Clean and tighten terminals and grounds
Start at the battery terminals, the ground strap to the body/engine, and the main charging cable. Corrosion or a loose ground drops voltage everywhere downstream and is the cheap, embarrassing cause worth eliminating before any testing.
- Test the battery
With the engine off and the battery rested, healthy is roughly 12.6 volts; then load-test it (many parts stores do this free). A battery that fails under load can drag system voltage low even with a good alternator, and it dies first when the alternator is weak — test it before blaming anything else.
- Measure charging voltage
Start the engine and read voltage at the battery: most systems charge in the high-13s to mid-14s. Now switch on headlights, blower, and rear defrost — if voltage sags well below 13 volts under load, the alternator isn't keeping up.
- Inspect the drive belt and tensioner
A glazed, cracked, or loose belt slips under load and mimics a bad alternator, especially in rain. Check belt condition and that the tensioner holds firm — a belt is a fraction of an alternator's cost.
- Replace the alternator or battery as testing shows
Only after grounds, battery, belt, and charging output have each been checked do you know which part failed. Replace what the tests condemn, then confirm charging voltage is back in range and the code stays gone.
DIY or shop? Every diagnostic step here is home-mechanic territory — a multimeter and ten minutes tell you most of the story, and parts stores will test the battery and alternator free. Battery replacement is easy; alternator difficulty depends entirely on where yours lives, from a twenty-minute top-of-engine job to a buried, remove-half-the-accessories ordeal. If your alternator requires major disassembly to reach, or the numbers don't clearly condemn one component, that's when shop labor makes sense. Don't put this one off — a car that isn't charging will eventually strand you.
Tools for the DIY steps: Digital multimeter · Battery terminal brush · Wrenches and socket set · Wire brush for ground points · Battery terminal protector spray
Not sure which step applies to your car? Get the likely cause for your exact vehicle before buying anything for P0562.
Start a case with P0562 and your car. Redline weighs these causes against what your car shows, and names the check that would settle it before you buy parts.
Can I drive with P0562?
Redline can’t determine from a symptom or code alone whether your car is safe to drive.
P0562 on specific vehicles
The likely causes shift by model. We’ve written up the patterns we see most:
P0562: common questions
Can I drive with P0562?
A code alone can't settle that. If the charging system has failed, the car is running on the battery and can stall and leave you stranded when it drains. Get the charging system tested promptly at a shop or parts store, and if the battery light comes on or the lights dim, pull over and have it towed.
Is P0562 the alternator or the battery?
Either, plus belts and connections. A failing alternator is the classic cause, but a weak battery, a loose belt, or corroded cables/grounds can all drop system voltage. A charging-system test (often free at parts stores) sorts it out.
Why is my battery light on with P0562?
Because the system voltage is low, which usually means the alternator isn't charging properly. The battery light is the charging-system warning — take it seriously, since the car is then running on stored battery power only.
How much does it cost to fix P0562?
From a cheap cable/ground cleanup, to a battery, to an alternator (the expensive end). Have the charging system tested first so you replace the right part rather than guessing.
Symptoms that trigger P0562
Drivers who get this code often notice one of these. Each has its own causes and cost guide:
Related trouble codes
Don’t have a scanner yet? A ~$25 Bluetooth adapter reads codes like P0562 from your phone. See our guide to the best OBD2 Bluetooth adapters. Run a repair shop? See Redline for shops.
Generic OBD-II reference. Manufacturer-specific behavior varies. Confirm with a scan tool and, for safety-related codes, a professional inspection. Cost ranges are reference ranges, not quotes.
Seeing P0562 on your car?
Every problem becomes a Case. Tell Redline what the car is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.