Crankshaft Position Sensor
2017 Ford F-150 · 3.5L V6 EcoBoost
Sensor Type
hall-effect
Waveform Type
dc-square
Location
Right side of engine block, above the starter motor, reading a 60-2 tooth reluctor wheel on the crankshaft
Pins
3-pin connector
Idle Frequency
50 Hz
Timebase
20ms/div
Voltage Scale
2V/div
Trigger
2.5V, rising edge
Wiring
Gray/Orange (signal), Black/White (ground), Brown/White (12V reference)
Expected Voltage Range
At Idle
0.2V to 5V
At Higher RPM
0.1V to 5.2V
Expected Pattern
60-2 tooth pattern with two missing teeth before TDC, square wave switching between ~0.3V and ~5V
Known-Good Waveform
Clean square wave transitions between low (0.2-0.4V) and high (4.8-5.2V) with uniform tooth spacing except for the missing tooth gap which should be exactly twice the normal tooth period. At idle (~600-700 RPM), frequency is approximately 50Hz with crisp vertical transitions taking less than 5 microseconds.
Common Failure Patterns
Signal stuck at 5V or 0V with no transitions
Cause: Failed Hall effect sensor element or broken wiring/connector
Intermittent signal dropouts or erratic voltage spikes
Cause: Damaged reluctor wheel teeth from debris ingestion or crankshaft keyway movement
Slow rise/fall times or rounded square waves
Cause: Excessive air gap due to sensor backing out or mounting bracket wear
Related DTCs: P0335
Diagnostic Tips
EcoBoost engines are known for oil contamination on the CKP sensor causing erratic signals; check connector for oil intrusion. Verify reluctor wheel hasn't shifted on the crankshaft, especially on high-mileage or modified engines with increased boost pressure.
Related Diagnostic Trouble Codes
P0335P0336P0337P0338P0339
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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