P0562: P0562 Diagnostic Guide

What this code means

P0562 may indicate that a control module is seeing system voltage lower than expected.

What the vehicle may do

The vehicle may display warning lights or low-voltage messages.
Electrical accessories or modules can behave unpredictably when system voltage is unstable.
Transmission operation may feel abnormal because electronic transmission controls rely on stable power.

Possible fault areas

Possible battery condition issue.
Possible charging system issue.
Possible power feed, ground, connector, or wiring concern.

Diagnostic path

Opening context

On this 2015 to 2025 F-150 with the 2.7 EcoBoost, P0562 may be a low system voltage fault. In plain language, a control module may be seeing voltage lower than it expects. The truck may show warning lights, low-voltage messages, strange electrical behavior, or transmission operation that feels off because the transmission controls need stable power. Broad possible areas can include the battery, charging system, power feeds, grounds, connectors, or wiring. The important point is this: the procedure available here is not a P0562 low-voltage diagnostic path, so do not turn this code into a transmission teardown without confirming the electrical side first.

Diagnostic boundary

For P0562, start with the basic system checks and follow a structured electrical diagnostic approach. If other faults are present, check what they mean first. The valve body work covered here may be valid transmission service for a separate reason, but it does not give the monitor gates, setting conditions, pinpoint tests, or repair verification for this low-voltage code. If you are only chasing P0562, pause here and use the proper low-voltage diagnostic routine before removing internal transmission parts.

If valve body service is already justified: harness and TFT removal

If a separate diagnosis has already put you inside the main control valve body, keep the work organized from the start. Positively identify the solenoids and valves before disturbing them. Disconnect the internal wiring harness, slide the plastic lock to the unlock position, press the plastic tabs, and disconnect the electrical connectors. Remove the internal wiring harness retaining bolt, disconnect the harness retainer, disconnect the remaining internal harness electrical connectors, unlock the plastic locks, press the tabs, and release the retainer so the internal wiring harness assembly can come out. Then remove the TFT sensor by lifting the plastic tab, rotating the TFT sensor clockwise, and removing the sensor. After that, remove the main control assembly to transmission fluid pump seal.

Internal valve body disassembly and inspection

Before the solenoids come out, note their orientation. Remove the bolts and the park lock pawl solenoid. Remove and discard the bolts for the solenoid retaining plate, then remove the solenoid retaining plate, TCC solenoid, and LPC solenoid. Remove the bolts and the shift solenoid retaining plate, then remove the valve body bolts. Remove and inspect the valve body channel plate, and separate the upper valve body from the lower valve body. If equipped, remove the pin-type retainer. Remove the valve body separator plate bolts, then remove and inspect the valve body separator plate. Handle the machined valve body surfaces carefully, and keep the channel plate and separator plate in service only if they are not damaged. Note the orientation of the valves and springs. Remove the LPC damper assembly, clutch exhaust check valve, transmission fluid auxiliary pump check valve, torque converter anti-drainback valve, and the check balls. Remove the retaining clips, cap, valves, and valve springs from each bore. Number solenoids 1 through 6, and number the main control solenoid ports 1 through 6 so each solenoid stays matched to its port. Note the clutch control valve and solenoid locations, then remove and discard the shift solenoid retainers. Remove the shift solenoids and clutch control valves. Remove the remaining retaining clips, cap, valves, and valve springs from each bore. Clean and inspect the lower valve body for damage, inspect the passages and valves, clean out excessive debris, and install a new component if necessary.

Valve body reassembly

Clean and inspect the upper valve body for damage. Inspect the passages and valves, clean out excessive debris, and install a new component if necessary. Install the valves, valve springs, caps, and retaining clips into the correct valve body bores. If new solenoids are needed, identify the solenoid band number. Install the clutch control valves and shift solenoids back into the corresponding marked locations, and install the new shift solenoid retainers with the flat side toward the solenoids. Install the check balls, keep the valve and spring orientation correct, then install the LPC damper assembly, clutch exhaust check valve, transmission fluid auxiliary pump check valve, and torque converter anti-drainback valve. Use 307-299 Alignment Pins, Valve Body, to align the valve body separator plate onto the lower valve body, then install the bolts and torque them to 8 Nm. If equipped, install the pin-type retainer. Align the guide pins on the upper valve body with the alignment holes in the lower valve body, install the valve body channel plate, loosely install the valve body bolts, loosely install the park lock pawl solenoid bolts, and loosely install the shift solenoid retaining plate bolts. Tighten the bolts in the required sequence to 12 Nm. If the sequence is not available in front of you, stop and verify the correct sequence before tightening; do not guess on a precision-machined valve body.

Harness, TFT sensor, and solenoid finish work

Push the internal wiring harness into the retainer. Install the TFT sensor by positioning it in the main control valve body, then rotate the TFT sensor counter clockwise until the plastic tab locks into place. Connect the internal wiring harness electrical connectors and slide the plastic lock to the locked position. If new solenoids are needed, identify whether each solenoid is normally high or normally low, and match the solenoid band number. Inspect the solenoid screens for debris that may restrict fluid flow, lubricate the solenoid O-ring seals, then install the TCC solenoid, LPC solenoid, solenoid retaining plate, and new bolts. Torque those bolts to 9 Nm. Connect the internal wiring harness, slide the plastic locks to the locked position, connect the internal wiring harness retainer, and install the main control assembly to transmission fluid pump seal.

Verification logic

Keep the verification separate from the valve body work. If the complaint is P0562, verify the repair through the proper electrical diagnostic path and confirm the code stays gone after the low-voltage concern is corrected. If the vehicle was apart for valve body service, also confirm the transmission operates correctly after reassembly, but do not call valve body work a fix for P0562 unless the electrical diagnosis actually supports it.

Takeaway

Bottom line: P0562 may point toward a system voltage concern, not automatically toward internal transmission repair. Confirm the electrical fault path first, and only perform valve body service when a separate diagnosis justifies going inside the transmission. For more diagnostic training, visit stepdiagnostics.com.