B144D on Lincoln
Tailgate/Liftgate/Boot/Trunk Position Sensor — Signal Invalid
B144D on Lincoln vehicles indicates tailgate/liftgate/boot/trunk position sensor — signal invalid. Au7o has documented this code across 1 Lincoln model — most commonly on Aviator. The Rear Gate/Trunk Module (RGTM) monitors the Hall-effect position sensors built into the power liftgate drive units to track gate travel and detect obstructions. B144D (typically reported with sub-type :29, 'signal invalid') sets when the position-sensor signal the module receives is implausible — missing pulses, no change during commanded travel, or a pattern the module cannot reconcile with gate position. Ford SSM guidance for 2020 Explorer/Aviator lists B144D alongside B144E, B1555 and B1556 as the fault set produced when the RGTM software incorrectly senses the liftgate ajar; on those vehicles the fix is an RGTM software update rather than hardware. Sensor numbering (1 vs 2) varies between published DTC charts.
Common Causes of B144D
- •Outdated RGTM software incorrectly interpreting gate position (Ford SSM — reprogram RGTM)
- •Water intrusion into a power liftgate drive unit / motor assembly
- •Failed Hall-effect position sensor inside the liftgate strut motor
- •Damaged or chafed liftgate harness in the hinge/loom area, or a corroded connector
- •Binding gate, worn struts or a misaligned latch producing implausible travel data
B144D on Lincoln by Model
Lincoln Aviator(1 issue)
- Power-Liftgate Faults - Apply Ford SSM Symptom Split Before Parts2020-2022
Ford documents several distinct Aviator power-liftgate conditions. On some 2020-2022 vehicles, failure only through hands-free intelligent access or the outside handle while doors are locked can result from a poor connection at rear-keyless-entry connector C4332 below the striker (SSM 50810). Some 2020-2021 inoperative liftgates can involve RGTM software (SSM 49914). Early 2020 vehicles built on or before February 17, 2020, can partially open or trigger a false anti-theft alarm with B144D, B144E, B1555, or B1556 from RGTM software (SSM 49015). These bulletins do not diagnose every liftgate fault.
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View B144D across all makes →Frequently Asked Questions
What does B144D mean on Lincoln?▼
B144D stands for "Tailgate/Liftgate/Boot/Trunk Position Sensor — Signal Invalid." The Rear Gate/Trunk Module (RGTM) monitors the Hall-effect position sensors built into the power liftgate drive units to track gate travel and detect obstructions. B144D (typically reported with sub-type :29, 'signal invalid') sets when the position-sensor signal the module receives is implausible — missing pulses, no change during commanded travel, or a pattern the module cannot reconcile with gate position. Ford SSM guidance for 2020 Explorer/Aviator lists B144D alongside B144E, B1555 and B1556 as the fault set produced when the RGTM software incorrectly senses the liftgate ajar; on those vehicles the fix is an RGTM software update rather than hardware. Sensor numbering (1 vs 2) varies between published DTC charts. On Lincoln specifically, this code is documented across 1 model.
What causes B144D on Lincoln vehicles?▼
Common causes on Lincoln: Outdated RGTM software incorrectly interpreting gate position (Ford SSM — reprogram RGTM), Water intrusion into a power liftgate drive unit / motor assembly, Failed Hall-effect position sensor inside the liftgate strut motor, Damaged or chafed liftgate harness in the hinge/loom area, or a corroded connector, Binding gate, worn struts or a misaligned latch producing implausible travel data. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B144D on a Lincoln?▼
Repair costs vary widely depending on the root cause and specific Lincoln model.
Which Lincoln models have B144D documented?▼
Au7o has documented B144D on 1 Lincoln model: Aviator.