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.
Narrow by vehicle
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.
P1901TURBINE SHAFT SPEED - TSS CODES
P1901TURBINE SHAFT SPEED - TSS CODES
Manufacturer communications
1Original wording in English
FORD, LINCOLN
EXHIBITING A CHECK ENGINE LIGHT ON AND POSSIBLE DIAGNOSTIC TROUBLE CODES P0715, P0716, P0717, P0718, P1901 (TURBINE SHAFT SPEED - TSS CODES) OR P0720, P0721, P0722, P1900 (OUTPUT SHAFT SPEED - OSS CODES). *TT
Check vehicle applicability
4A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | EXPEDITION ↗ | 1999 |
| Ford | F-150 ↗ | 1999 |
| Ford | F-250 ↗ | 1999 |
| Lincoln | NAVIGATOR ↗ | 1999 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
TSS Circuit Intermittent Malfunction
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.