P0562 - SYSTEM VOLTAGE LOW

Even if the ignition switch is off, the battery still supplies power to the ECM (Engine Control module). In this way, the Engine Control Module (ECM) can store data such as DTC (Diagnostic Trouble Code) history, freeze data, and fuel adjustment values.

If the battery voltage is below a minimum level, the ECM (Engine Control module) interprets this as the existence of a fault in the power circuit. When the engine starts, the service light comes on and the diagnostic code P0562 is obtained.

• The Check Engine light is on.
• Turn on the red battery light.
• The transmission may not change correctly.
• The engine may not start or may cause problems and shut off.
• There is less fuel consumption.

A P0562 code can be caused by one or more of the following problems:

• The battery charge is low.
• The battery may be defective.
• There may be a failure in the resistance of the cable that goes from the alternator to the battery.
• Perhaps there is a short circuit between the alternator and the Engine Control Module (ECM).
• The alternator could be defective.

To fix the DTC code P0562 you can check the following components:

• With the vehicle running, turn on the headlights and accelerate the vehicle so that the electrical system charges. Then using a digital volt ohm measurement tool, check that the battery voltage is between 13.2 and 14.7 volts. In case the voltage is below 12 volts, or conversely above 15.5 volts, it diagnoses the charging system, taking into account mainly the alternator. If the voltage results are within the corresponding limits, delete the codes and check to see if it reappears.
• Check the connections of the PCM (Powertrain Control Module) in search of a cable that shows wear or a burn, likewise verify that the terminals of these connectors do not have corrosion, repair or change if necessary.
• Check the voltages to the Power Train Control Module (PCM). To do this, disconnect the negative cable from the battery, then disconnect the cables that go to the Power Train Control Module (PCM). Then connect the battery cable again and pass the ignition switch. With a multimeter, check the power supply circuit of the PCM. Make sure there is good ground in the PCM and check the cable from the PCM to the ignition switch, in case the battery voltage is not within the necessary parameters.