Throttle Position Sensor
2011 Ford F-150 · 3.5L V6 EcoBoost
Sensor Type
hall-effect
Waveform Type
dc-variable
Location
Integrated into electronic throttle body assembly on intake manifold inlet, driver side of engine
Pins
6-pin connector
Timebase
1s/div for sweep test
Voltage Scale
1V/div
Trigger
Not applicable - analog signal
Wiring
Part of throttle body connector: TP1 signal (Gray/White), TP2 signal (Brown/White), 5V reference (Red/White), ground (Black/White), motor control wires
Expected Voltage Range
At Idle
0.45V to 0.95V
At Higher RPM
4.2V to 4.7V
Expected Pattern
Two independent linear voltage signals (TP1 and TP2) that move in opposite relationship; TP1 increases from ~0.7V to ~4.5V as throttle opens, TP2 decreases from ~4.3V to ~0.9V
Known-Good Waveform
Two smooth, linear voltage traces moving in opposite directions with no glitches or steps. At closed throttle (idle), TP1 should read 0.6-0.9V and TP2 should read 4.0-4.5V. The sum of both sensors should equal approximately 5V throughout the entire sweep. No dropouts, spikes, or flat spots during smooth throttle movement.
Common Failure Patterns
Erratic voltage spikes, dropouts, or steps in the voltage trace during smooth throttle movement
Cause: Carbon buildup on throttle blade causing binding, worn throttle shaft bushings, or internal potentiometer track wear
TP1 and TP2 correlation errors, signals not moving in proper inverse relationship or sum not equaling 5V
Cause: Internal sensor circuit failure, water intrusion into throttle body connector, or PCM detection of rationality fault
Diagnostic Tips
EcoBoost throttle bodies are prone to carbon buildup from direct injection and turbo oil vapor; perform throttle relearn after cleaning. Do not use aggressive cleaners that can damage coating. Ford requires throttle body relearn procedure using IDS or equivalent scan tool after replacement or battery disconnect.
Related Diagnostic Trouble Codes
P0120P0121P0122P0123P0124
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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