P0562: System Voltage Low
Quick answer
P0562 is the standardised OBD-II code for system Voltage Low. The computer measured system voltage below its normal operating range, which points to a charging or connection problem rather than the computer itself. The most likely cause is weak or failing battery, not the most expensive one. Keep any driving short and light until it is repaired.
Severity 3 of 4. Short trips only.
Fix now · Short trips only
| Code | P0562 |
|---|---|
| Standard name | System Voltage Low |
| System | Speed, idle and auxiliary input |
| Subsystem | Charging and system voltage |
| Sets the | Comprehensive component monitor |
| Severity | Fix now (3 of 4) |
| Safe to drive | Short trips only |
| Tool needed | Scanner with live data |
| Cause | How often | What to check |
|---|---|---|
| Weak or failing battery | Most likely | The most common cause, especially in an older battery. |
| Corroded battery terminals or ground straps | Common | A cheap and common cause to check before replacing parts. |
| Loose or slipping alternator belt | Worth checking | Reduced belt grip reduces charging output. |
| Failing alternator | Less common | The alternator may not be producing enough current. |
| Parasitic drain left on overnight | Uncommon | A component left drawing power can leave the battery starting each drive already low. |
TOPDON TopScan Lite OBD2 Scanner, Bidirectional Scan Tool, 8 Resets & AI
Adds live sensor streams and freeze frame, which is what turns a code into a diagnosis rather than a guess.
Coverage varies by tool and by model year, so check a specific tool against a specific vehicle before buying.
What does P0562 actually mean?
The computer measured system voltage below its normal operating range, which points to a charging or connection problem rather than the computer itself.
The code sits in the charging and system voltage area and is reported by the comprehensive component monitor. It names the circuit or the condition where the computer saw a reading outside its expected range. It does not name a failed part, and several genuinely different faults set this same code, which is the whole reason the causes below are ordered rather than listed.
What people usually notice
- Lights dim noticeably at idle
- Engine stalls or hesitates unexpectedly
- Dash warning lights flicker or reset
- Accessories act sluggish
Why does P0562 set?
The causes below are ordered by how often they turn out to be the answer, cheapest and most common first. That order matters more than the list itself: the expensive component named in the code text is very rarely the first thing to replace, and working down from the top is what stops a charging and system voltage fault becoming an expensive guess.
Weak or failing battery is the one to rule out before anything else. The most common cause, especially in an older battery.
The order worth checking on P0562
Start with freeze frame. Check the system voltage value stored when the code set and compare it to a normal running voltage. That snapshot is taken at the instant the code set, and it is the single most useful piece of evidence you have, which is also why clearing the code before reading it is such a costly habit.
This code is diagnosed by watching values change rather than by reading the number again, so the tool has to stream live data and hold freeze frame. Live data on system voltage under load is the fastest way to separate a battery, belt or alternator problem.
The order worth working in
- 1. Weak or failing battery: The most common cause, especially in an older battery.
- 2. Corroded battery terminals or ground straps: A cheap and common cause to check before replacing parts.
- 3. Loose or slipping alternator belt: Reduced belt grip reduces charging output.
- 4. Failing alternator: The alternator may not be producing enough current.
- 5. Parasitic drain left on overnight: A component left drawing power can leave the battery starting each drive already low.
Is it safe to drive with P0562?
Low system voltage can cause the engine to stall, lights to dim and other modules to reset while driving, get it checked before the battery drains further.
This is a severity 3 of 4 code, which means continuing to drive normally risks damage that costs considerably more than the repair in front of you. Treat the lamp as an instruction rather than a notification.
What does it cost to ignore P0562?
Continuing to drive on low system voltage risks a stall in traffic and accelerates battery and alternator wear.
There is also the diagnostic cost of waiting. Freeze frame data, pending code history and the readiness monitor state all describe the fault as it was when it set, and all of it is lost the moment somebody clears the code to make the lamp go out.
Tools that can diagnose P0562
Adds live sensor streams and freeze frame, which is what turns a code into a diagnosis rather than a guess.
- LJPXHHU
OBD2 Bluetooth Scanner Car Code Reader for iOS, Android and Windows
- wireless
$13.98 Check pricePrices change often - Veepeak
Veepeak Mini Bluetooth OBD2 Scanner Code Reader for Android (NOT for iOS)
- wireless
$14.99 Check pricePrices change often - MOCATEC
WiFi ELM327 OBD2 Adapter WiFi ELM 327 OBD Scanner for Universal 12V Vehicle
- wireless
$15.95 Check pricePrices change often - UMEIJA
OBD2 Scanner Diagnostic Tool, Car Scanner for iOS & Android, Bluetooth 5.4
- wireless
$29.99 Check pricePrices change often
Common questions
What does code P0562 mean?
P0562 is the generic OBD-II code for system Voltage Low. The computer measured system voltage below its normal operating range, which points to a charging or connection problem rather than the computer itself. It is a standardised definition, so it means the same thing on every manufacturer, although the fault behind it differs from car to car.
Can I drive with P0562?
Low system voltage can cause the engine to stall, lights to dim and other modules to reset while driving, get it checked before the battery drains further. On the severity scale this sits at 3 of 4, described as fix now. Whatever the code, a check engine light that starts flashing changes the answer immediately: that means an active misfire and the correct response is to reduce load and stop driving.
What is the most common cause of P0562?
Weak or failing battery is the cause worth ruling out first. The most common cause, especially in an older battery. Work down the ordered list rather than replacing the component named in the code text, because that component is the expensive answer and it is rarely the right one.
Will P0562 clear itself?
If the underlying fault genuinely goes away, the computer turns the lamp off after the monitor passes on a number of consecutive drive cycles, and the code moves to history before ageing out. A code that clears and returns is not fixed, it is intermittent. Clearing it manually erases the freeze frame data and resets every readiness monitor to incomplete.
What scanner do I need for P0562?
This code is diagnosed by watching values change rather than by reading the number again, so the tool has to stream live data and hold freeze frame. Live data on system voltage under load is the fastest way to separate a battery, belt or alternator problem. Vehicle coverage still varies by tool and by model year, so check a specific tool against a specific vehicle rather than assuming a capability tier guarantees access.