P0562 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 engine starts running much worse, stalls, or the warning light flashes.
!The vehicle loses power sharply or the electrical system is acting unstable while the code is active.

If the light is steady and the vehicle still drives normally: Often yes for a short time, but it should not be ignored.

What to check first

Step-by-step checks

1
Safety first
Check the battery and charging system with the engine off and keep clear of moving belts and fans
2
Free - no tools
Inspect battery terminals, grounds, and main power cables for looseness or corrosion
3
Basic tool needed
Notice whether the problem happens at idle, after start-up, or when accessories are turned on
4
Basic tool needed
If scan data or a meter is available, compare battery voltage at rest and with the engine running
5
Basic tool needed
If multiple modules are acting up, treat the voltage side as a likely root cause before chasing each code separately

If the code returns

-If charging voltage is low, the alternator, belt, or regulator moves higher on the list.
-If a cable or ground repair improves the reading, revisit the system before buying parts.
-If the code returns after the charging side checks out, look for an intermittent connection or battery issue.

Background

What this code means

P0562 is a generic OBD-II system-voltage low code.

The ECU is seeing lower-than-expected voltage, which can come from the battery, alternator, cables, grounds, or a charging system that is not keeping up.

Hard starts, dim lights, or multiple unrelated codes can appear when the voltage drops too far.

Diagnosis

Common causes

Most common

Weak battery

A battery that is failing under load can pull system voltage down.

Common

Alternator or regulator fault

The charging system may not be keeping voltage in range.

Common

Corroded battery or ground connection

A poor connection can create a low-voltage condition.

Possible

Belt or charging-drive problem

A slipping belt or drive fault can reduce alternator output.

Avoid these mistakes

What not to do

xDo not replace parts before checking the battery, connectors, fuses, and switch inputs that feed the circuit.
xDo not ignore drivability changes just because the code sounds like a switch or voltage issue.

Parts

Parts that may need replacing

PartTypical costNotes

Battery$100-$250Relevant when the battery fails load testing or cannot hold charge.

Alternator$150-$600Relevant when charging output is low even with the battery sound.

Battery terminals or cables$20-$120Worth checking if corrosion or looseness is present.

Related OBD codes

P0563

P0563 usually means system voltage is too high.

P0565

P0565 usually means cruise control on signal malfunction.

P0572

P0572 usually means brake switch A circuit is reading too low.

Source notes

Generic OBD-II (SAE J1979 / ISO 15031-5). P0562 was expanded around common low-voltage faults, including battery, charging, cable, and ground issues.

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

P0562 - P0562 Usually Means System Voltage Is Too Low