Dodge Ram: P0562 – System Voltage Low

Common OBD-II trouble codes include P0562.  It’s a general code, which means that it means the same thing for any vehicle, including the Dodge Ram.  P0562 It means that the system voltage drops below 10 V for more than a minute.  With the engine running, the system voltage should be 14.1-14.4 volts, and it’s typically caused by a bad alternator.  It’s very common to get the battery light with P0562.

P0562 Quick facts

• P0562 is triggered whenever your Ram’s voltage drops below 10 volts for over a minute straight.
• The ideal voltage is around 14 volts when the engine is running.
• There may not be any obvious symptoms.
• The most common cause is a defective alternator.

P0562 Symptoms:  Dodge Ram

If P0562 is the only code your Ram has, there typically aren’t any noticeable symptoms.Other than the check engine/battery lamp.  If your battery voltage falls too low, you may experience symptoms.

If you do experience symptoms, it’s due to battery drain.  it is very likely that your Ram wouldn’t even turn back on if you tried.  Your battery may not be able to charge the starter.

Below are the top P0562 symptoms:

• Verify Engine Liabilityght– This is the most common symptom, and often the only symptom.
• Warning/Low Battery Light–  You’ll more than likely get the battery light with this code.
• Poor Fuel Economy–  This can occur when your Ram’s engine and computer are not getting enough voltage.  The computer may be unable to control the ignition timing, fuel mix or air/fuel ratio in real-time.  Oder, it may be too weak.
• Failure– Without enough voltage to fire the spark plugs properly, the motor will sputter and cough.  If there is enough misfire, the check engine lamp may flash.
• Probleme shifting– Today’s modern automatic transmissions are computer controlled.  Without enough voltage getting to them, they won’t be able to respond to the engine RPM and vehicle speed in a timely manner.
• Won’t Start– A very common situation with P0562 is running the vehicle and everything is operating fine, and the check engine light comes on (battery light too, usually).  You get the vehicle home and when you go to drive it again it won’t start.  It is most likely that the alternator has failed.  

P0562 Causes + Diagnosis:  Dodge Ram

Below are the top causes of P0562.

1. Alternator

The alternator supplies voltage to the battery and to all of your Ram’s electrical system while it is running.  It can also cause P0562 if it is damaged.  If it goes all the way bad that’s make diagnosing the code relatively easy.  The vehicle won’t start if it runs too long with a bad alternator.  How long it would take to drain the battery all the way is going to depend on the battery’s age and driving conditions.

It’s when the alternator begins to intermittently fail it can be tricky to diagnose.  Your alternator can be tested at most auto parts shops for no cost.  You can get a replacement alternator at most auto parts stores if yours fails. It is quite affordable.  While you're at it, make sure to replace the serpentine belt.

Dodge Ram Alternator Diagnosis

2. Voltage regulator

In order to prevent the charger from overloading, it ensures that only a specific voltage flows to it.  The regulator can prevent too high voltage passing through and even throw out P0562.

3. Wiring of batteries

There’s a lot of wiring associated with your Ram’s charging system.  The following wiring should be checked for corrosion, fraying, or poor connections.

• Battery terminals– The battery terminals, if left alone long enough, will corrode on any vehicle.  When this happens it’s difficult for the charging system to function properly.
• Wiring an alternator for a battery– Take a look at the wiring from the alternator to the battery.  Examine the wiring from the alternator to battery for damage or fraying.  Be especially careful with parts that come in contact with other parts of the engine.
• Ground Wire– The ground wire that bolts to the negative battery terminal will bolt to the chassis or engine block.  It is important to ensure the connection remains strong and free of corrosion.
• Connect PCM to an Alternator– Check to see if the wiring going from the alternator straight to the PCM looks good.  This wiring has a great distance to travel so it can get damaged.  The wiring harness's connection to the motherboard should be checked for fraying.  It is not the most common wiring problem on our list. You should only investigate it if you are unable to find any other solutions.

4. Bad Battery

While a bad battery can throw P0562, it’s not nearly as likely as an alternator or wiring issue.  It is important to have the battery tested before you replace it.

5. Massive Battery Loss

If your vehicle has aftermarket equipment such as a very high watt stereo system, winch, or something else, it could be placing such a heavy load on the charging system that you’re getting P0562.  It should take at most a minute for the code to be thrown.

A major power draw can occur if there is a problem.  If something goes wrong and draws too much power, this can occur.

Diagnose of Battery Drainage in Dodge Ram

Conclusion:  P0562 Dodge Ram

It can be difficult to track down P0562.  It’s usually the alternator that is at fault.  You can add anything to this article.  Have fun fixing up your Ram