Crankshaft Position Sensor
2011 Ford F-150 · 5.0L V8 Coyote
Sensor Type
variable-reluctance
Waveform Type
ac-sine
Location
Right side of engine block, above the starter motor, reading a 36-1 reluctor wheel on the crankshaft
Pins
2-pin connector
Idle Frequency
46.67 Hz
Timebase
20ms/div
Voltage Scale
5V/div
Trigger
0V, rising edge
Wiring
Gray/Yellow (signal) and Black (signal return/ground)
Expected Voltage Range
At Idle
-1.5V to 1.5V
At Higher RPM
-12V to 12V
Expected Pattern
36-1 tooth pattern with one missing tooth for TDC reference, creates 35 AC sine waves per revolution with visible gap where the missing tooth occurs
Known-Good Waveform
At idle (700 RPM), expect clean AC sine waves at approximately 3V peak-to-peak with consistent amplitude and frequency. The missing tooth gap should be clearly visible and occur once per crankshaft revolution. Voltage amplitude increases proportionally with engine speed, reaching 8-15V peak-to-peak at higher RPM.
Common Failure Patterns
Erratic amplitude variation, inconsistent peak voltages, or weak signal below 1V at idle
Cause: Sensor air gap too large (should be 0.020-0.059 inches), debris on reluctor wheel, or weak internal magnet
Complete loss of waveform or extremely low voltage output
Cause: Open circuit in sensor winding, corroded connector pins, or damaged wire harness
Related DTCs: P0335
Noisy signal with high-frequency interference superimposed on waveform
Cause: Damaged reluctor wheel teeth, excessive runout, or electromagnetic interference from aftermarket accessories
Related DTCs: P0336
Diagnostic Tips
The Coyote 5.0L is very sensitive to air gap issues; verify reluctor wheel runout and sensor mounting. Check for oil leaks that may have contaminated the sensor area, as this is a common issue on these engines.
Related Diagnostic Trouble Codes
P0335P0336P0337P0338P0339
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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