DOCUMENTED DIAGNOSTIC CONTEXT

Diagnostic code articles — Page 35.

Understand what the recorded fault means, which findings change the diagnosis, and what the cited documentation can confirm. Each article states the system or vehicle scope it covers.

Some sources leave details unresolved. Those articles include a visible source note; a code match alone does not establish applicability to your vehicle.

Downshift circuit low has a printed threshold conflict to resolve

A downshift input-high fault concerns voltage, not a held paddle

Auxiliary transmission-pump motor circuit is diagnosed open

CVT auxiliary pump supplies inadequate pressure during an auto-stop event

Auxiliary transmission-pump control circuit is electrically low

Auxiliary transmission-pump control circuit detects unwanted power

transfer-case high-range command disagrees with measured ratio

transfer-case low-range command disagrees with measured ratio

transfer-case range information that needs a careful cross-check

Solenoid A characterization data does not match a valid programmed set

Solenoid B data fails the transmission controller’s compatibility check

Solenoid C calibration data fails completeness or integrity checks

Solenoid D characterization is not accepted as correctly programmed

Solenoid E characterization data is missing, incompatible or invalid

Solenoid F stored characterization does not pass startup validation

pressure-control solenoid G characterization data is invalid

pressure-control solenoid H characterization fails validation

Range-control supervision can involve parking-lock safety

The transmission architecture determines what this supervision code means

Gear-direction supervision distinguishes launch from wrong-direction events

Overspeed protection and ratio plausibility are different supervision branches

Transmission tie-up protection and deceleration supervision need different context

Shift solenoid two stuck-off is checked with controlled rod movements

A stuck-on shift valve is inferred from two rods moving differently

Shift valve two open-load is assessed with the output off

Shift valve two circuit-low concerns driver feedback during switching

Shift valve two circuit-high has a shutdown cross-circuit check too

Valve three stuck-off needs a second path to validate rod feedback

Valve three stuck-on is a paired rod-response pattern

An open valve-three circuit is evaluated before hydraulic conclusions

Valve-three low-circuit diagnosis requires its electrical test context

Valve-three circuit high can be retained from a shutdown test

Valve-four stuck-off compares failed motion with a working alternate path

Valve-four stuck-on requires unexpected travel and partner relaxation

Valve-four open-load uses the circuit’s off-state response

Valve-four circuit low is an electrical report, not a hydraulic verdict

Valve-four high can also mean a shutdown interaction with another output

Valve five needs current-profile evidence because no alternate path exists

Valve-five stuck-on uses a larger single-rod movement criterion

Valve-five open-load remains an electrical off-state test

Valve-five low-circuit classification must be separated from stuck-off behavior

Valve-five circuit high has two distinct event histories

mode-valve A position signal occupies an illegal voltage band

mode-valve A position does not follow its commanded state

mode-valve A position circuit voltage is too low

mode-valve A position signal exceeds its electrical limit

An invalid middle-band voltage can produce a circuit-open result

Mode-valve feedback fails to follow a range command

Low range-position feedback can represent more than a ground short

Range-position circuit high is not a request for a higher gear

Range sensor B frequency must be checked separately from its position duty cycle

Internal transmission range sensor B has a low PWM-circuit signal

Range sensor B signal is high from a power short or an open path

Confirm Ford’s general B-circuit classification before assuming intermittency

Independent range-sensor channels disagree after duty-cycle adjustment

A differential valve stuck-off diagnosis combines pressure and current-profile tests

Differential valve stuck-on requires pressure despite a zero-current command

pressure-control solenoid G electrical circuit is open

pressure-control solenoid G circuit shorted to ground

pressure-control solenoid G circuit shorted to supply

GR10 torque-converter clutch fails to achieve commanded coupling

GR10 torque-converter clutch remains coupled when commanded off

pressure-control solenoid H electrical control path is open

why solenoid H circuit-low can also mean an open circuit

solenoid H voltage-high diagnosis depends on valve mapping

a documented park-lock valve stuck-off monitor

how a park-lock valve is diagnosed hydraulically stuck on

T93 default-disable valve open-circuit detection

solenoid J circuit-low and the T87a open-circuit exception

what solenoid J circuit-high actually identifies

Selector pilot stuck-off is distinguished from a selector spool fault

Selector pilot stuck-on needs both wrong-route movement and a failed profile

Selector pilot open-load is an off-state electrical check

Selector pilot circuit low uses driver evidence, not rod movement

Selector pilot high can originate in a shutdown cross-output test

Rod-one plausibility is checked against speed evidence and alternate actuation

Rod-one circuit low includes missing pulses or an undersized duty cycle

Rod-one circuit high can be a missing-pulse or duty-cycle fault

Rod-one intermittent code checks digital frequency, not just dropouts

Rod-two consistency uses independent gear evidence before blaming position