Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
2Original wording in English
FORD, LINCOLN
Some 2025-2026 Explorer/Aviator vehicles may exhibit a no crank/no start/discharged battery condition with diagnostic trouble codes (DTC) B144D:29, B144E:29, B1555:29, B1556:29 and/or U3003:16 stored in the rear gate trunk module (RGTM). The power liftgate may also be inoperative. This may be due to water intrusion into the left…
FORD, LINCOLN
Some 2020 Explorer/Aviator vehicles built on or before 17-Feb-2020 may exhibit an intermittent partial opening of the power liftgate and/or false activation of the anti-theft alarm with diagnostic trouble codes (DTCs) B144D, B144E, B1555 and/or B1556 stored in the rear gate trunk module (RGTM). This may be due to the software in…
Check vehicle applicability
6A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | EXPLORER ↗ | 2026 |
| Ford | EXPLORER ↗ | 2025 |
| Ford | EXPLORER ↗ | 2020 |
| Lincoln | AVIATOR ↗ | 2026 |
| Lincoln | AVIATOR ↗ | 2025 |
| Lincoln | AVIATOR ↗ | 2020 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Ignition Run/Start Circuit Failure
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.