P0560 Code Meaning and Next Steps

First checks take 10 to 15 minutes for the first checks. No special tools are usually needed for the first checks.

Can you keep driving?

Stop driving if any of these apply

!The battery warning light is on and the vehicle is losing electrical power.
!The voltage is clearly unstable, the engine stalls, or accessories begin failing.

If the light is steady and the vehicle still drives normally: Sometimes yes for a short time, but charging-system problems can get worse quickly.

What to check first

Step-by-step checks

1
Free - no tools
Check battery terminals for corrosion, looseness, or damaged cables
2
Free - no tools
Measure battery voltage with the engine off and running if possible
3
Basic tool needed
Inspect the alternator belt and charging connections for obvious problems
4
Basic tool needed
Notice whether the problem gets worse with headlights, rear defrost, or other electrical load
5
Basic tool needed
If the code appeared after a battery change, verify the charging system is still working correctly

If the code returns

-If the battery and charging voltage are stable, the wiring or control side becomes more likely.
-If the code returns after a terminal cleanup, check the alternator and grounds under load.
-If the electrical system is clearly unstable, do not ignore it because a larger charging problem can strand the vehicle.

Background

What this code means

P0560 is a generic OBD-II voltage or reference-supply code.

These codes usually mean the ECU sees a voltage, reference, or charging-system value that is outside the normal range.

The battery light may come on, the vehicle may start oddly, or electrical accessories may act up if the charging system is unstable.

Diagnosis

Common causes

Most common

Weak battery

A battery that is failing can make the system voltage unstable.

Common

Alternator or regulator issue

The charging system may not be maintaining normal voltage.

Common

Loose or corroded terminals

Poor connections can make voltage jump around.

Possible

Ground or charging cable problem

A bad cable can drop system voltage under load.

Avoid these mistakes

What not to do

xDo not ignore repeated low-voltage warnings, because they can damage modules or leave the vehicle stranded.
xDo not replace the ECU before checking battery, charging, and reference-voltage basics.

Parts

Parts that may need replacing

PartTypical costNotes

Battery$120-$250Relevant when the battery is actually weak or failing.

Alternator$250-$900Worth checking when charging voltage is unstable.

Battery cable or ground repair$20-$200Relevant if the connections are loose or corroded.

Related OBD codes

P0561

P0561 usually means the system voltage is unstable or outside the normal range.

P0562

P0562 usually means system voltage is too low.

Source notes

Generic OBD-II (SAE J1979 / ISO 15031-5). P0560 was expanded around common system-voltage faults, including weak batteries, charging problems, and poor connections.

This guide is written as a generic multi-make reference, so bulletin history, sensor locations, and repair order can still change by manufacturer and engine family.

This is generic OBD-II guidance and should not override vehicle-specific service information. Exact diagnosis and repair steps vary by make, engine family, and model year.

Last reviewed: 2026-04-10

Reference: Open reference

P0560 - P0560 Usually Means the System Voltage Is Not Behaving Normally