P0562: System Voltage Low

What this code means

P0562 may mean the gear shift module is seeing lower supply voltage than expected.

What the vehicle may do

The vehicle may have shifting or gear-selection concerns.
Warnings or intermittent electrical behavior can occur when voltage drops are present.
The concern may come and go if the voltage issue is intermittent.

Possible fault areas

Possible battery or charging system concern.
Possible fused power feed or circuit problem.
Possible ground issue.
Possible connector, terminal, corrosion, or loose connection concern.
Possible gear shift module concern.

Diagnostic path

What P0562 is telling you

On this F-150, P0562 is a low system-voltage code for the gear shift module on the column-shift 10R80 setup. In plain terms, the module saw supply voltage drop lower than it should. The truck may have shifting or gear-selection concerns, warning messages, or intermittent behavior if the voltage drop comes and goes. Broadly, you’re thinking possible battery or charging issues, a fused power feed problem, a ground problem, connector damage, or a module concern. The GSM normally needs operating voltage between 9 and 16 volts, and this code indicates the voltage supplied to the GSM fell below 9 volts.

Start with the basic checks

Start by duplicating the customer concern if you can. Operate the vehicle and confirm the condition before you get deep into testing. Then do a visual inspection for obvious mechanical or electrical damage. If you find an obvious cause, correct it before moving on. If nothing is obvious, pull the GSM codes and move into the code-based path for P0562. If there are no codes present, stay symptom-based instead of forcing a P0562 test path.

Check whether the whole vehicle is low on voltage

Before blaming the GSM circuit, look at the rest of the vehicle. With the scan tool, retrieve continuous memory codes from all modules and see whether other modules also show low-voltage faults. If low-voltage faults are present elsewhere, diagnose the vehicle charging concern first. If the low-voltage issue is not showing up in other modules, continue with the battery check.

Check battery condition, then recheck the GSM

Carry out the battery condition test. If the battery passes, keep going. If it does not pass, the directed repair is a new battery before continuing this GSM diagnosis. After that, clear all GSM codes, turn the ignition off, turn the ignition on, wait 10 seconds, and run the GSM self-test. If P0562 does not return, the system is operating correctly at this time, and the code may have been from a previous low battery voltage condition. If P0562 is present again, move into the GSM power and ground checks.

Test the GSM power feed

For the power circuit test, turn the ignition off, disconnect GSM connector C2503, and inspect it for damaged or pushed-out terminals. Then turn the ignition on and measure voltage with the positive lead at C2503 pin 1 and the negative lead to ground. You’re looking for greater than 11 volts. If it is greater than 11 volts, continue to the ground test. If it is not greater than 11 volts, verify BCM fuse F7 is OK. If the fuse is OK, identify and repair an open in the power circuit. If the fuse is not OK, identify and repair a short to ground.

Test the GSM ground, then check connector integrity

Next, turn the ignition off and check the GSM ground circuit for an open. Measure resistance with the positive lead at C2503 pin 16 and the negative lead to ground. The decision point is less than 3 ohms. If it is less than 3 ohms, move on to checking GSM operation. If it is not less than 3 ohms, verify ground G201 is clean and properly fastened. If that checks OK, repair the open circuit.

Confirm the connector and final direction

Now check for correct GSM operation. With the ignition off, disconnect and inspect the GSM connector. Repair corrosion, damaged or bent pins, and pushed-out pins as needed. Connect the GSM connector again and make sure it seats and latches correctly. Then operate the system and see if the concern is still present. If the concern is gone, the system is operating correctly at this time, and the issue may have been from a loose or corroded connector, so address the root cause of any connector or pin problem. If the concern is still present, check for an applicable TSB, GSB, SSM, or FSA. If one applies, stop this test and follow that direction. If none applies, the directed repair is a new GSM.

Takeaway

The key on P0562 is to prove whether the low-voltage problem is vehicle-wide, battery-related, or isolated to the GSM power, ground, or connector before condemning the module. For more diagnostic training, visit stepdiagnostics.com.