Camshaft Position Sensor
2017 Toyota Camry · 2.5L I4
Sensor Type
hall-effect
Waveform Type
dc-square
Location
Cylinder head, intake side (front of engine), near timing chain cover monitoring the intake camshaft timing rotor with 3 vanes at positions corresponding to cylinders 1, 2, and 4
Pins
3-pin connector
Idle Frequency
11.7 Hz
Timebase
50ms/div
Voltage Scale
2V/div
Trigger
2.5V, rising edge
Wiring
Brown wire (12V reference/power), Black wire (ground), and Gray wire (signal output)
Expected Voltage Range
At Idle
0.2V to 5V
At Higher RPM
0.1V to 5V
Expected Pattern
Three square wave pulses per camshaft revolution (one per vane), unequally spaced pattern specific to 1-2-4 cylinder identification, signal switches between near 0V and 5V
Known-Good Waveform
Clean digital square wave switching between approximately 0.2V (low) and 5.0V (high) with three distinct pulses per camshaft rotation at unequal intervals. The spacing between pulses varies to provide cylinder identification - not evenly spaced like the crankshaft pattern. Rise and fall times should be sharp (less than 1ms) with no ringing or oscillation on transitions.
Common Failure Patterns
Signal stuck at 5V or 0V with no switching, or intermittent dropout of pulses
Cause: Failed Hall-effect sensor IC, shorted or open signal wire, corroded connector causing intermittent contact
Rounded or sloped transitions instead of sharp square edges, signal not reaching full 5V
Cause: Weak power supply to sensor (voltage drop in reference circuit), failing sensor output transistor, excessive resistance in signal wire
Diagnostic Tips
This 2AR-FE engine uses VVT-i (Variable Valve Timing) on intake cam only - verify cam timing rotor is not slipping on camshaft and that VVT-i oil control valve is functioning properly as excessive timing variation will cause erratic CMP signals. Always check timing chain wear as stretched chains are common failure on high-mileage examples causing correlation codes.
Related Diagnostic Trouble Codes
P0340P0341P0342P0343P0344
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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