Locate the camshaft position sensor
Inspect the sensor connector and wiring for damage, corrosion, or loose pins
Check the sensor power supply with a multimeter
Check the sensor ground with a multimeter
Test sensor resistance if the manufacturer specifies resistance values
Test the sensor signal output while cranking the engine
Use an oscilloscope to verify the camshaft signal waveform
Compare readings to the vehicle service manual specifications
Check for related trouble codes with an OBD-II scanner
Clear codes and retest after repairs
Substitute with a known good sensor if needed
Verify engine starts and runs correctly after testing