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Home › Waveforms › 2018 Ford F-150 › Camshaft Position Sensor

Camshaft Position Sensor

2018 Ford F-150 · 5.0L V8 Coyote

5V2.6V0.2V50ms/div | 2V/divdc-square
Sensor Type
hall-effect
Waveform Type
dc-square
Location
Right cylinder head (passenger side) rear, monitoring intake camshaft; left cylinder head (driver side) rear for bank 2
Pins
3-pin connector
Idle Frequency
21.5 Hz
Timebase
50ms/div
Voltage Scale
2V/div
Trigger
2.5V, rising edge

Wiring

Brown/White (12V supply), Black/Light Green (signal), and Black/White (ground)

Expected Voltage Range

At Idle
0.2V to 5V
At Higher RPM
0.2V to 5V

Expected Pattern

Square wave digital signal with varying pulse widths corresponding to cam position windows; 4 windows per camshaft revolution in specific pattern for cylinder identification

Known-Good Waveform

Clean digital square wave transitioning between 0.2V (low) and 5.0V (high) with crisp edges and no rounding. Pattern shows 4 distinct windows of varying width per camshaft revolution at half crankshaft speed. At idle, frequency is approximately 21-22 Hz with well-defined high and low states. Ti-VCT (Twin Independent Variable Camshaft Timing) operation will show phase shift relative to crankshaft position under varying load conditions.

Common Failure Patterns

Signal stuck at 5V or 0V with no transitions, flat line on scope
Cause: Failed Hall effect sensor, open circuit in signal wire, or loss of 12V supply/ground
Related DTCs: P0340, P0345, P0341, P0346
Rounded or slow transitions between high and low states, voltage not reaching full 5V
Cause: Weak Hall sensor output, high resistance in supply or ground circuit, or sensor air gap too large (should be 0.020-0.040 inches)
Related DTCs: P0340, P0345
Intermittent signal dropouts or missing pulses in pattern
Cause: Worn camshaft phaser components creating excessive play, damaged tone wheel on camshaft, or intermittent connector issues common on high-mileage F-150s
Related DTCs: P0340, P0345, P0016, P0017

Diagnostic Tips

The Coyote Ti-VCT system is known for phaser rattle and wear; verify 12V supply present at sensor and compare cam signal timing to crank sensor using dual-channel scope to diagnose phaser issues. Check for oil pressure-related phaser faults as low oil pressure affects cam timing correlation.

Related Diagnostic Trouble Codes

P0340P0341P0342P0343P0344
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.

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