P0562 code meaning
System Voltage Low
What P0562 means
The module measures its own supply voltage. CARB allows other monitors to be suspended below 11 V, and above a maker's threshold only if the voltage itself is diagnosed – that is what these codes record. GM's engine modules and Ford's PCM set them without warning lamp. P0562 means the voltage is below its threshold with the engine running, when the charging system should deliver: GM 9 V or less at 400 rpm or more in 400 of 500 samples (about 5 s), type C. Saab's 9-4X modules may switch off temporarily below about 9 V. Many other modules, such as GM's brake module, set P0562 themselves.
P0562 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0562
- Battery or charge warning lamp
- Starting problems, dim lights
- Codes in several modules
Common causes of P0562
- Most likelyAlternator or regulator delivering too little
- Most likelyBattery faulty (shorted cell)
- PossibleCorroded terminals, ground straps or alternator cable
- Less likelyHigh quiescent current or many consumers at idle
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
BatteryAlternatorModule power supplyEngine control module
What each part of P0562 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 62 | The exact fault in that area. |
What to do next
- Note P0562 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0562
What does P0562 mean?
P0562 means "System Voltage Low". The module measures its own supply voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P0562?
P0562 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0562 fail an emissions test?
P0562 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0562 to fix?
Difficulty: easy. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0562 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.