Throttle Position Sensor
2018 Jeep Wrangler · 3.6L V6
Sensor Type
hall-effect
Waveform Type
dc-variable
Location
Integrated into electronic throttle body assembly on intake manifold, passenger side of engine
Pins
6-pin connector
Timebase
500ms/div
Voltage Scale
1V/div
Trigger
Single sweep trigger on throttle movement
Wiring
Two 5V reference (Orange/Dark Blue, Violet/White), two signal wires (Violet/Brown, Violet/Black), two grounds (Black/Light Blue, Black/Red)
Expected Voltage Range
At Idle
0.5V to 1.2V
At Higher RPM
4V to 4.7V
Expected Pattern
Dual redundant analog voltage signals that increase smoothly and proportionally from closed to wide open throttle, inverse relationship between TP1 and TP2
Known-Good Waveform
Two smooth, linear DC voltage ramps when throttle is opened slowly. TP1 rises from approximately 0.5-0.8V at closed throttle to 4.0-4.5V at wide open throttle. TP2 should move inversely, starting higher and decreasing as throttle opens. Both signals should track smoothly with no steps, jumps, or noise. At idle, TP1 typically reads 0.6-1.0V.
Common Failure Patterns
Stepped or stair-case voltage pattern instead of smooth ramp during throttle sweep
Cause: Worn throttle position sensor tracks or internal sensor degradation
TP1 and TP2 signals do not maintain proper inverse relationship
Cause: Sensor correlation failure or internal electronic throttle control module fault
Diagnostic Tips
The 3.6L electronic throttle body is prone to carbon buildup requiring cleaning every 60-80k miles. Always perform throttle body relearn procedure after cleaning using factory scan tool. Monitor both TP sensor signals simultaneously - they should be mirror images of each other.
Related Diagnostic Trouble Codes
P0120P0121P0122P0123P0124
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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