Camshaft Position Sensor
2018 Toyota Camry · 2.5L I4 Hybrid
Sensor Type
hall-effect
Waveform Type
dc-square
Location
Cylinder head front end, passenger side of intake camshaft, behind timing chain cover accessible from valve cover area
Pins
3-pin connector
Idle Frequency
17 Hz
Timebase
50ms/div
Voltage Scale
2V/div
Trigger
2.5V, rising edge
Wiring
White/Black (signal), Brown (ground), Orange (12V power supply)
Expected Voltage Range
At Idle
0.3V to 4.7V
At Higher RPM
0.2V to 4.8V
Expected Pattern
3 pulses per camshaft revolution (6 pulses per crankshaft revolution) with varying pulse widths for cylinder identification
Known-Good Waveform
Digital square wave with distinct pulse pattern containing 3 pulses of different widths per cam revolution for sync recognition. Voltage switches cleanly between 0.3-0.5V (low) and 4.5-4.8V (high). Pattern timing shifts during VVT-i operation as cam phasing changes relative to crank position, especially noticeable during transitions from idle to 2000 RPM.
Common Failure Patterns
Extended cranking time with P0016 code, cam/crank correlation error visible as timing shift between sensors
Cause: Timing chain stretch (common after 150k miles) or VVT-i oil control valve failure causing improper cam phasing
Intermittent loss of sync pattern, erratic pulse spacing or missing pulses during VVT actuation
Cause: Cam sensor reluctor wheel movement on camshaft from worn dowel pin or retaining bolt looseness
Weak signal amplitude, voltage not exceeding 3.5V or not dropping below 1.5V
Cause: Sensor air gap too large from improper installation or sensor mounting tab breakage
Related DTCs: P0345
Diagnostic Tips
Compare cam sensor waveform phase relationship to crank sensor during VVT-i actuation; proper advance/retard should show smooth phase changes. A8FXS hybrid transmission requires precise cam/crank sync for engine auto-stop feature; inspect VVT-i oil control valve and oil passages if correlation codes present.
Related Diagnostic Trouble Codes
P0340P0341P0342P0343P0344
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
Free, no signup. View all waveforms for this vehicle