Crankshaft Position Sensor
2016 Ford F-150 · 5.0L V8 Coyote
Sensor Type
variable-reluctance
Waveform Type
ac-sine
Location
Right side of engine block, near the crankshaft damper, monitoring a 36-1 tooth reluctor wheel on the crankshaft
Pins
2-pin connector
Idle Frequency
43 Hz
Timebase
20ms/div
Voltage Scale
5V/div
Trigger
0V, rising edge
Wiring
Gray/Yellow (signal) and Black (ground) - unshielded pair
Expected Voltage Range
At Idle
-2.5V to 2.5V
At Higher RPM
-18V to 18V
Expected Pattern
36-1 tooth pattern with one missing tooth gap per revolution; sinusoidal AC waveform with amplitude increasing with RPM, distinct missing tooth signature every 360 degrees
Known-Good Waveform
Clean sinusoidal AC waveform showing 35 consistent teeth followed by a wide gap (missing tooth) used for synchronization. At idle (650-700 RPM), amplitude should be 4-6V peak-to-peak, increasing proportionally with engine speed to 30-40V peak-to-peak at 3000+ RPM. All teeth should be uniform in amplitude and spacing except the missing tooth gap.
Common Failure Patterns
Erratic amplitude with some teeth showing reduced voltage or missing peaks, inconsistent waveform
Cause: Sensor air gap incorrect (should be 0.020-0.050 inches), debris on reluctor wheel, or worn sensor tip
Complete loss of signal or extremely weak signal less than 1V peak-to-peak at cranking
Cause: Failed VR sensor internal coil, broken wire, or damaged reluctor wheel teeth
Diagnostic Tips
The Coyote engine uses a non-magnetic VR sensor; verify reluctor wheel condition and check for metallic debris buildup. Resistance should measure 200-450 ohms between the two pins. F-150 applications commonly experience connector corrosion due to engine bay heat and moisture.
Related Diagnostic Trouble Codes
P0335P0336P0337P0338P0339
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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