Description
Williams Controls 131040 electronic throttle position sensor (TPS) for Cummins ISX and pre-1998 mechanical-pedal Cummins engines. Sensor only — this is the replacement potentiometer that bolts onto the existing accelerator pedal assembly, not a complete pedal. Williams Controls has superseded this part with 131973 (improved durability and electrical interface), but the 131040 remains the correct fitment for original installations.
Signs You Need a New Throttle Position Sensor
- Erratic idle, surging, or sudden loss of throttle response
- Engine ECM throwing TPS-related fault codes (open circuit, signal out of range)
- Pedal feels normal but the engine does not respond to pedal input
- Cruise control drops out unexpectedly
Specifications
| Manufacturer | Williams Controls |
|---|---|
| Part Number | 131040 |
| Part Type | Throttle Position Sensor (sensor only) |
| Engine Compatibility | Cummins ISX; pre-1998 mechanical-pedal Cummins (e.g. 351375, 351376, 351377 pedal assemblies) |
| Function | Potentiometric pedal-position sensor for ECM throttle input |
| Supersession | Superseded by Williams Controls 131973 |
Cross References
This part replaces or is equivalent to the following part numbers:
- Williams Controls (current supersession): 131973
- Also known as: A129863
Applications
This throttle position sensor fits the following accelerator pedal assemblies:
- Williams Controls 351375, 351376, 351377 pedal assemblies (pre-1998 Cummins)
- Williams Controls 340000 sensor-kit applications
- Cummins ISX original-equipment Williams pedal assemblies
Representative vehicles using these pedal assemblies include Class 8 trucks built with Cummins ISX or pre-1998 Cummins on-highway engines (Freightliner, Kenworth, Peterbilt, International, Volvo, Mack).
Sensor only — if the pedal assembly itself is worn or the harness is damaged, replace the complete pedal kit (e.g. Williams Controls 131973 / 134168) instead. Verify your existing pedal model number before ordering.
