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 wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1784624WD/AWD Transfer Case Shift Motor Limit Switch and Transfer Case H4-L4 Position Switch Signal Compare Failure
Manufacturer communications
10Original wording in English
TOYOTA
Some 2024 – 2025 model year 4WD Tacoma and Tacoma Hybrid vehicles may exhibit a condition where the 4WD lights are flashing and a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs) present: •P277111 – Four Wheel Drive (4WD) Low Switch Circuit Short to Ground •P178462 – 4WD/AWD Transfer Case Shift …
KIA
TECH TIMES: 1 Introducing Kia Diagnostic System (KDS) 3 Mega Ohm Insulation Tester 4 Kia Global Information System Enhancement 4 Enabling Wi-Fi on UVO eServices W/Premium Navigation Equipped Vehicles (Customer Guide) 5 AVN4.0 UVO eServices Dealer Engineering Mode 7 Crossword Puzzle 8 Rain Sensing Wiper Sensor Cadenza 9 Second Ro…
KIA
PIT STOP: ?HYBRID SYSTEM WARNING!? MESSAGE IN CLUSTER AND MIL-ON WITH DTC P1784 - When diagnosing an Optima Hybrid with a ?Hybrid System Warning!? message (A) in the cluster, the malfunction indicator lamp (MIL) on and DTC P1784 (EOP 3-Phase Wiring Line Open), in either active or in history, check for contact between the Electri…
MAZDA
SOME VEHICLES MAY EXPERIENCE THE MIL ON WITH DTC P0780 (GEAR SHIFTING MALFUNCTION) AND/OR P1738 (AUTO-MATIC TRANSAXLE INTERNAL MALFUNCTION) WITH/WITHOUT U0401, OR OTHER DTCS STORED IN MEMORY.OTHER DTCS (WITH THE ABOVE DTCS) - P0746:00, P0751:00, P0752:00, P0756:00, P0757:00, P0761:00, P0762:00, P0766:00, P0767:00, P0771:00, P077…
Check vehicle applicability
16A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | WINDSTAR ↗ | 1998 |
| Ford | WINDSTAR ↗ | 1997 |
| Ford | WINDSTAR ↗ | 1996 |
| Ford | WINDSTAR ↗ | 1995 |
| Kia | KIA ↗ | Year unknown |
| Kia | OPTIMA HYBRID ↗ | 2015 |
| Kia | OPTIMA HYBRID ↗ | 2014 |
| Kia | OPTIMA HYBRID ↗ | 2013 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Transmission Mechanical Failure – First And Reverse
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.