How To Fix P0562 Obd2 Code? [System Voltage Low]

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How To Fix P0562 Obd2 Code?
Table of Contents

The P0562 code is saved when the PCM (powertrain control module) detects a vehicle voltage that is lower than intended. If the vehicle voltage level drops below 10.0 volts for 60 seconds or longer when idle, the PCM will store the code.

P0562 Meaning

The internal combustion engine’s camshaft position sensor keeps tabs on the camshaft’s location and rotating speed. The ECM interprets the square wave voltage signal it generates as the crankshaft position when used with the Reluctor ring. 

P0562 Meaning:

The ECM uses this information to manage ignition spark and fuel injector timing. The ignition spark and fuel injector timing fail when the P0335 fault code is triggered because the engine does not know when to fire these components.

OBD-II Code P0562: Symptoms, Causes & Diagnose


The presence of a P0562 code is associated with several symptoms. 

Among them:

  • When the Check Engine or Maintenance Indicator Lamp comes on.
  • Battery light on/off switch.
  • Shifting incorrectly.
  • A reduced amount of mileage per gallon.
  • Wasting away to nothingness.


  • A shoddy charging mechanism may be the root cause of the problem.
  • A faulty generator.
  • A significant reduction in battery life.
  • The voltage regulator is faulty.
  • The alternator’s wiring or connectors may be defective.
  • Incorrect wiring between the PCM and the alternator.
  • The B+ battery cable from the alternator to the battery is defective.
  • A faulty battery or connections are connecting the battery to the power source.
  • A malfunctioning microprocessor control module (rare).

How to Diagnose?

To determine whether any additional codes relate to the charging system, an OBD-II scanner will be used. After this, they’ll go over all possible reasons why the code is being saved systematically. 

To ensure they’ve detected and fixed the issue, if a fault is discovered, such as a lousy charging system ground, the code is cleared, and the vehicle is retested.

Tools You Need:

  • FIXD
  • Multimeter
  • Hand Instruments That Everyone Should Have


Check for technical service bulletins (TSB) for your car. The manufacturer may have already addressed the problem, saving you time and money in the process.

Low battery voltage/disconnected battery/charging system malfunction is the most typical cause (faulty alternator). While we’re at it, let’s not overlook the charging system’s most ignored component, the alternator belt!

  • Check the charging system first. Start the car. 
  • Turn on the headlights and the blower fan to load the system. Check the battery voltage using a DVOM. It should be 13.2 to 14.7 volts. If the voltage is below 12 volts or over 15.5 volts, look at the charging system, especially the alternator. 
  • If uncertain, take it to a nearby car parts store or repair shop. Some demand a small fee, if not free, and provide a printout of the test findings.
  • You may delete the diagnostic issue codes from memory and test whether this code reappears if the voltage is correct. 
  • If it doesn’t, the code is intermittent or a history/memory code, and no more testing is necessary.
  • If the P0562 code returns, find the PCM. Locate the connections and wires. Look for rubbing, exposed wires, burn marks, or melted plastic. 
  • Disconnect the connections and check the terminals (metal pieces) inside. Examine them for burns or a green color from rusting. Use an electrical working cleaner and a plastic material bristled brush to clean the ends. Dry, then add electrical grease to the terminals.
  • If this code reappears, clear the diagnostic problem codes from memory using the scan tool. If it doesn’t, the connections were probably the issue.
  • If the P0562 code returns, we’ll need to verify the PCM voltages. First, unplug the negative battery cable. Disconnect the PCM harness next. Replug the battery. Start the engine. 
  • The PCM ignition feed circuit is DVOM’d (Red leads to the PCM ignition feed circuit, black lead to a good ground). If this circuit has fewer battery volts, fix the PCM to the ignition switch wire.
  • If that’s OK, check your PCM ground. Connect a testing light to the 12V cell positive (red end) and the other terminal to the PCM firing feed circuit base. If the test light is off, the circuit is bad. 
  • Whether it does, twist the PCM wire harness to check if the test light flickers, suggesting a bad connection.
  • If all previous tests pass yet, you still receive a P0562; you failed PCM. If uncertain, consult a qualified car technician. Installing PCMs appropriately requires programming or calibration of the vehicle.

A common mistake you must avoid when diagnosing P0562:

You’ll want to reset the code and do another test drive after making any changes to your engine. This will reveal whether the issue has been resolved or if anything else was to blame. It’s far more challenging to figure out what occurred if you fix numerous sections at once.

In addition, many individuals overlook the importance of the cooling system. This system is most likely to blame if anything else goes wrong.

How to fix P0562?

The P0562 error might be challenging to solve. Again, the easiest way to get rid of the error code is to hire an expert.

However, if you are confident in your ability to fix the problem yourself, bear in mind that there is no “silver bullet” for the P0562 code—as with most other OBD-II codes. Make careful you thoroughly investigate the problem before deciding on a course of action.

  • The most typical repair for a P0562 code in some Dodge cars is to replace the battery – assuming, of course, that the underlying problem was a defective battery.
  • Remember to utilize internet auto repair resources to ensure that you are directed appropriately while undertaking any DIY repair or replacement on your automobile. 
  • Single-vehicle ALLDATA subscriptions are also available, making this an excellent investment for anybody who intends to do all of their auto repairs in the future.

Always refer to your vehicle’s owner’s handbook before doing any maintenance or repairs.

Tips for further avoiding P0562 obd2 error:

Nothing a driver may do will prevent a P0562 code from turning on the check engine light. Pay attention to how much gasoline you use. 

You should see your mechanic if you’re using more gasoline than usual. Use the gasoline octane recommended by your vehicle’s manufacturer, and get your oil and other fluids checked out regularly.