P0562 Low system voltage

Trouble Code P0562 OBD-II Datasheet

Low voltage in the system.

Code P0562 is stored when the PCM (Powertrain Control Module) detects that the vehicle's voltage is below the required voltage. If the vehicle voltage level drops below 10,0 volts for 60 seconds or more while idle, the PCM will store a code.

What does trouble code P0562 mean?

This Generic Transmission / Engine DTC usually applies to all vehicles from 1996 onwards, including but not limited to Kia, Hyundai, Jeep, Mercedes, Dodge, Ford, and GM vehicles.

The PCM controls the charging system of these vehicles to a certain extent. The PCM can control the charging system by operating the supply or ground circuit of the voltage regulator inside the generator.

The powertrain control module (PCM) monitors the ignition circuit to determine if the charging system is working. If the voltage is too low, a DTC will set. This is a purely electrical problem.

Troubleshooting steps may vary depending on manufacturer, charging system control type, and wire colors.

Symptoms

Symptoms of a P0562 engine code may include:

• Fault indicator light is on
• The red battery indicator is on
• Gearbox cannot shift
• The engine may not start, or if it does, it may stall and stall
• Lower fuel economy
• No gear change
• Reduced fuel consumption

Most of these symptoms can be related to other codes as well as other problems with the vehicle. If the engine stalls at idle and does not start, the battery may be defective. There are many problems that can be associated with a P0562 code, so it's important to have a professional mechanic diagnose the cause of the problem.

Causes of the P0562 code

Possible reasons for setting this code:

• High resistance in cable between alternator and battery - possibly
• High resistance/open circuit between generator and control module - possible
• Faulty alternator - most often
• Failed PCM – Unlikely
• One or more reasons for the charging system
• Defective generator
• High battery consumption
• Faulty voltage regulator
• Faulty wiring or connector(s) to alternator
• Faulty wiring connecting alternator to PCM.
• Faulty B+ battery cable from alternator to battery.
• Defective battery and/or battery cables

Diagnostic and repair procedures

A good starting point is always to check the Technical Service Bulletins (TSB) for your particular vehicle. Your problem may be a known issue with a known manufacturer-released fix and could save you time and money while troubleshooting.

The most common cause of this code is low battery voltage / battery that has been disconnected / faulty charging system (faulty alternator). While we're on the subject, let's not forget to check out the most neglected part of the charging system - the alternator belt!

Check the charging system first. Start the car. Turn on the headlights and fan at high speed to load the electrical system. Use a digital volt ohmmeter (DVOM) to check the voltage at the battery. It should be between 13.2 and 14.7 volts. If the voltage is significantly below 12V or above 15.5V, diagnose the charging system, focusing on the alternator. If you are unsure, check the battery, starting and charging system at your local parts store / body shop. Most of them will perform this service for a small fee, if not free, and will usually provide you with a printout of the test results.

If the voltage was correct and you have a scan tool, clear the DTCs from memory and see if this code returns. If it is not, it is more than likely that this code is either intermittent or history / memory code and no further diagnostics are required.

If the P0562 code does return, look for the PCM on your specific vehicle. Once detected, visually inspect the connectors and wiring. Look for scratches, scuffs, exposed wires, burn marks, or molten plastic. Disconnect the connectors and carefully inspect the terminals (metal parts) inside the connectors. See if they look burnt or have a green tint indicating corrosion. If you need to clean the terminals, use an electrical contact cleaner and a plastic bristle brush. Allow to dry and apply electrical grease where the terminals touch.

Then clear the DTCs from memory with a scan tool and see if the code returns. If this is not the case, then there is most likely a connection problem.

If the P0562 code does return, we will need to check the voltages on the PCM. Disconnect the negative battery cable first. Next, we disconnect the harness going to the PCM. Connect the battery cable. Switch on the ignition. Using the DVOM, test the PCM ignition feed circuit (red lead to PCM ignition feed, black lead to good ground). If this circuit is less than battery voltage, repair the wiring from the PCM to the ignition switch.

If everything is ok, make sure you have a good PCM base. Connect a test lamp to the 12 V battery positive (red terminal) and touch the other end of the test lamp to the ground circuit that leads to the PCM ignition power circuit ground. If the test lamp does not light up, it indicates a faulty circuit. If it does light up, wiggle the wire harness going to the PCM to see if the test light is flashing, indicating an intermittent connection.

If all previous tests pass and you keep getting P0562, this most likely indicates a PCM failure. If you are unsure, seek help from a qualified automotive diagnostician. To install correctly, the PCM must be programmed or calibrated for the vehicle.

COMMON ERRORS WHEN DIAGNOSING CODE P0562

The most common errors related to P0562 are misdiagnosis. It is often assumed that the problem is due to a bad or defective battery or a problem with the starter. Replacing both will not prevent the code from being saved, nor will it fix freezing issues and other symptoms.

HOW SERIOUS CODE P0562 IS?

If the voltage level in the vehicle drops too low, the vehicle may stall at idle and be unable to start again. For this reason, it is important to resolve the issue immediately to ensure the safety of others while traveling.

WHAT REPAIRS CAN FIX CODE P0562?

Some of the more common repairs to the P0562 code are:

• Repair or replace any faulty, loose, or otherwise poor charging system base.
• Replacing a faulty generator
• Replacing a damaged battery and/or battery cables, including B+ battery cable
• Replacing or repairing a faulty voltage regulator
• Finding and replacing faulty wiring or generator connectors
• Replace or repair a faulty PCM

ADDITIONAL COMMENTS TO BE AWARE OF CODE P0562

In some rare cases, a code P0562 will have no symptoms other than the Check Engine light. In this case, the problem should still be fixed immediately as the underlying problem can become symptomatic and can leave you stranded. Also, to pass the OBD-II emissions test, you must ensure that all codes are cleared and that the Check Engine light is off.

P0562 ✅ SYMPTOMS AND CORRECT SOLUTION ✅ - OBD2 Fault Code

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