Camshaft Position Sensor
2016 Ford F-150 · 3.5L V6 EcoBoost
Sensor Type
hall-effect
Waveform Type
dc-square
Location
Bank 1 (passenger side): rear of cylinder head near firewall. Bank 2 (driver side): rear of cylinder head. Both read variable reluctor wheels
Pins
3-pin connector
Idle Frequency
12.5 Hz
Timebase
50ms/div
Voltage Scale
2V/div
Trigger
2.5V, rising edge
Wiring
Gray/Yellow (signal), Black/White (ground), Orange/White (12V reference)
Expected Voltage Range
At Idle
0.2V to 5V
At Higher RPM
0.1V to 5.2V
Expected Pattern
Variable pulse width pattern with asymmetric tooth spacing for cylinder identification, one pulse per cylinder per camshaft revolution
Known-Good Waveform
Square wave with varying duty cycles between pulses (ranging from 20% to 50%) to create unique cylinder identification pattern. Signal should switch cleanly between 0.2-0.4V and 4.8-5.2V with crisp transitions. The pattern should align with crankshaft position within 3 degrees of specification, with cam phaser adjustments visible as gradual phase shifts during acceleration.
Common Failure Patterns
Correlation errors between cam and crank sensors showing incorrect phase relationship
Cause: Timing chain stretch or failed cam phaser solenoid causing incorrect valve timing
Missing or intermittent cam pulses with irregular pattern
Cause: Failed cam sensor or damaged reluctor wheel on camshaft
Diagnostic Tips
EcoBoost 3.5L is notorious for cam phaser issues causing timing correlation codes; verify oil change history and monitor cam/crank phase relationship during cold start when phasers should be in locked position. Compare both bank 1 and bank 2 cam signals simultaneously to detect timing chain stretch.
Related Diagnostic Trouble Codes
P0340P0341P0342P0343P0344
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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