Camshaft Position Sensor
2019 Jeep Wrangler · 3.6L V6
Sensor Type
hall-effect
Waveform Type
dc-square
Location
Two sensors: Bank 1 (driver side) mounted in the front of the cylinder head near timing chain; Bank 2 (passenger side) similarly located on opposite head
Pins
3-pin connector
Idle Frequency
25 Hz
Timebase
20ms/div
Voltage Scale
2V/div
Trigger
2.5V, rising edge
Wiring
Tan/Yellow (signal), Orange (5V reference), Black/Light Blue (ground)
Expected Voltage Range
At Idle
0.2V to 4.8V
At Higher RPM
0.1V to 4.9V
Expected Pattern
Square wave pattern with varying pulse widths corresponding to camshaft position wheel design, 4 pulses per camshaft revolution (8 per crankshaft revolution), asymmetric pattern for cylinder identification
Known-Good Waveform
Clean digital square wave switching between 0.3V and 4.7V with four distinct pulses of varying widths per camshaft revolution to identify individual cylinders. At idle, frequency approximately 25 Hz (half of crankshaft frequency). Pattern should be consistent and repeatable with sharp transitions and no ringing.
Common Failure Patterns
Loss of signal or erratic pattern with missing pulses, inconsistent duty cycle variation
Cause: Timing chain stretch causing erratic cam-to-crank correlation, worn camshaft position wheel, or sensor failure from oil contamination
Diagnostic Tips
The 3.6L Pentastar has known issues with timing chain stretch and rocker arm failures. Always verify cam-to-crank correlation on both banks. P0016/P0017 codes often indicate chain stretch beyond 4-5 degrees. Use dual-trace scope to compare both cam sensors simultaneously for phaser operation verification.
Related Diagnostic Trouble Codes
P0340P0341P0342P0343P0344
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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