This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.
Definition
This code shows that the system voltage is low. When the vehicle voltage level drops below 10 volts for a minute or more at a time, the code will be stored.
Meaning
The P0562 code means that the powertrain control module has detected that the voltage level of the vehicle is too low. The charging system of a vehicle is designed to make sure that the voltage level stays consistent at the correct level. A normal voltage level for a vehicle that is idle with the headlights off ranges from 14.1 to 14.4 volts. When this code is set either the check engine light on the dashboard or the malfunction indicator light will illuminate.
Causes
There are a variety of causes that can trigger the P0562 code. It could be an issue with the battery or battery cables of the vehicle such as a large battery drain, a battery or battery cables that are defective or the B+ battery cable that runs from the alternator to the battery could be faulty.
An alternator or voltage regulator that is faulty are also common causes. Wiring could also be an issue if the wiring that is connecting the alternator to the powertrain control module could be faulty or defective.
One or more charging system grounds that are operating improperly could be the cause as well. In rare cases, the powertrain control module could be faulty.
Symptoms
Symptoms of the P0562 code include the inability to shift properly, lower fuel efficiency, the battery dying at idle and illumination of the check engine light, battery light or malfunction indicator light. There are also cases where no noticeable symptoms will appear.
Diagnosis
A mechanic will begin diagnosing the vehicle by using an OBD-II scanner. Here’s a great one we use everyday. This is used to check if any other codes are stored that could affect the charging system. When this is done, they will follow strict methodology to work through and find all of the potential causes for the code’s storage.
If a problem such as a poor charging system ground is found it will be fixed, the code will be cleared and it will be tested again to make sure that the correct problem has been found and repaired.
Common mistakes
One of the most common mistakes associated with addressing the P0562 code is to rush through the diagnosis, which could lead to a misdiagnosis of the problem. It is a common assumption that the issue is related to a dead battery or problems with the starter.
Replacing either of these will not stop the code from storing, and it will also not solve the issues with stalling and other symptoms related to the P0562 code. To find the correct solution in a quick and efficient way, every aspect of the problem must be taken into account. A professional mechanic will be well aware of these common mistakes, and take steps to avoid them.
Also read: Can A Bad Alternator Cause Engine To Shake
How serious is this?
The P0562 DTC-II is an incredibly serious code because it can lead to a car accident. The vehicle may stall when it is idle and it may not be able to start up again if the voltage level drops too low. This means that it is important to address the code as soon as possible to ensure the safety of drivers on the road.
What repairs can fix the code?
There are several repairs that can fix the problems associated with the P0562 code. A bad alternator, battery, battery cables or faulty wiring or connectors to the alternator may need to be replaced. Repairs or replacement may be necessary for loose or faulty charging system grounds, a defective voltage regulator or a faulty powertrain control module.
Related codes
None listed.
Conclusion
It is important for the safety of the driver and others on the road to properly diagnose and repair problems associated with the P0562 code as soon as possible. If left untreated, the battery in the vehicle could die when idle and cause serious drivability issues.
In rare cases there will be no symptoms from the P0562 code, but it could eventually become symptomatic. A driver will be unable to pass an OBD-II emissions test until the code is clear and the check engine light is no longer illuminated.
Following the proper diagnostic and repair procedures can prevent a driver from having a dead battery and being stuck for an extended period of time. An excellent way to make sure that this will be dealt with properly is to hire a trained mechanic.
DOWNLOAD
A PDF VERSION OF THIS ARTICLE FOR LATER
