P0562 on a Jeep: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can usually drive a Jeep for a short time, but a weak battery or failing alternator can leave you stranded, so get the charging system checked soon.

What P0562 means on a Jeep

On a Jeep, P0562 means the engine computer sees system voltage below about 10 volts. Some Wranglers and Gladiators use a main battery plus a small auxiliary battery, and a failing auxiliary battery can drag down the whole electrical system.

Is P0562 common on Jeeps?

P0562 is common on Grand Cherokees and Cherokees with aging batteries, and on Wranglers where the auxiliary battery fails. Jeep's electrical system is sensitive to low voltage, so a weak battery can trigger this code before the car stops starting, and corroded terminals and failing alternators are also frequent causes.

Commonly reported on: Wrangler, Grand Cherokee, Cherokee, Gladiator.

Symptoms

Check engine light on
Slow cranking or hard starting
Dim headlights
Battery warning light on the dash

Common causes

most common: Weak or old main battery
common: Failing auxiliary battery on models that have one
common: Failing alternator
common: Corroded or loose battery terminals

How to fix it

Fix	DIY?	Typical cost
Test the main battery and replace it if weak	Yes	$150–300
Replace the auxiliary battery	Mechanic	$150–400
Clean and tighten the battery terminals	Yes	$0–20
Replace the alternator	Mechanic	$500–1000

Frequently asked questions

Can I drive my Jeep with a P0562 code?

Yes, for a short time, as long as it starts. If the charging system fails, the battery will die and the Jeep can stall, so have it checked soon.

Why do some Jeeps have two batteries and can that cause P0562?

Some Wranglers and Gladiators have a main battery plus a small auxiliary battery. If the auxiliary battery fails, it can drag down system voltage and set P0562 even when the main battery is okay.

How much does it cost to fix P0562 on a Jeep?

A new main battery runs about $150–$300, and the auxiliary battery about $150–$400. Alternator replacement runs about $500–$1,000.