P0562

What P0562 means

The engine computer keeps an eye on the voltage it's actually getting to run on. P0562 means that voltage dropped below what the computer expects to see while the car is running, usually somewhere under about 11 to 11.5 volts depending on the manufacturer. This isn't a code about one broken part. It's the computer saying "I'm not getting enough electricity," and there are several reasons that can happen.

Is it safe to drive

For a short trip, probably. But low system voltage can cause odd electrical behavior while you're driving: dimming or flickering lights, gauges acting up, the car stalling or being hard to restart, or other warning lights coming on alongside this one. If you see any of that, or the battery light is also on, get it looked at before you drive it much further. If the car is running fine and this is the only code, it's fair to schedule it in rather than treat it as an emergency today.

Common causes, most likely first

A weak or failing battery is the most common cause. Batteries lose the ability to hold voltage under load as they age, and this can happen before the battery is dead enough to fail a simple test. After that, a failing alternator or a worn voltage regulator (often built into the alternator on newer cars) is next most likely. Corroded or loose battery cables and ground straps cause this too, and they're cheap to fix if that's the actual problem. Less commonly, a bad connection at the alternator plug, a blown fuse feeding the charging circuit, or wiring damage from rodents or rubbing can cause the same code. On some GM and Ford vehicles specifically, a communication fault between the alternator and the computer can trigger this without the alternator itself being bad. Which of these it is depends on the car, and there's no way to know without testing it.

What diagnosis involves and rough cost

Diagnosis starts with a battery test and a check of actual charging voltage at idle and under load, then a look at the wiring and connections between the battery, alternator, and computer before anyone assumes the alternator is bad. That testing is usually a straightforward diagnostic charge, since it doesn't take long once the car is on the lift.

If it turns out to be the battery, that's the cheapest fix. An alternator replacement costs more and varies a lot by vehicle, since some are easy to get to and some take a couple hours of labor just to reach. If it's a corroded cable or connection, that's usually on the lower end. We won't know which of these applies to your car until we test it, and we'd rather tell you that than guess.

We're at 28801 Meridian E in Graham, open Monday through Friday, 8 to 5. Bring it in and we'll test the charging system before we tell you what it needs.

Generic OBD-II guidance — manufacturer-specific codes and causes vary by make, so always confirm against your vehicle. A code identifies a system or condition; it does not, on its own, prove which part has failed.