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Switches & Sensors

Camshaft Sensor / Crankshaft Sensor

Camshaft Sensor:

  • Monitors the positions of the camshaft to allow for correct ignition timing

Crankshaft Sensor:

  • Detects the position of the crankshaft allowing the ECU to calculate its position in relation to the pistons in the engine

Troubleshooting:

  • Symptoms:
    • Engine misfiring
    • Loss of engine power
    • Vehicle failing to start
  • Possible causes for failure:
    • Damaged wire connector
    • Damage to sensor element

Testing:

To test the camshaft sensor disconnect it from its electrical connectors. Ensure that the ignition is turned off before disconnecting.

  1. Firstly, check the resistance of the part. For this, connect a multimeter to the sensor’s connectors and rub a metal object over the tip of the sensor. This should show varied resistance between 200 and 900 ohm. If this is recorded then the sensor is working correctly.
  1. If further investigation is needed, try measuring the voltage being sent to the sensor by connecting a multimeter to the electrical connectors. This will determine whether the sensor is receiving a signal from the ECU.

Other components to check:

✓ Timing belt (this may have jumped teeth)

✓ Ignition system

Common Fault Codes (Camshaft)

  • P0020 “A” Camshaft Position Actuator Circuit (Bank 2)
  • P0021 “A” Camshaft Position – Timing Over-Advanced or System Performance (Bank 2)
  • P0022 “A” Camshaft Position – Timing Over-Retarded (Bank 2)
  • P0023 “B” Camshaft Position – Actuator Circuit (Bank 2) See Trouble Code P0020
  • P0024 “B” Camshaft Position – Timing Over-Advanced or System Performance (Bank 2) – See Trouble Code P0021
  • P0025 “B” Camshaft Position – Timing Over-Retarded (Bank 2) – See Trouble Code P0022

Common Fault Codes (Crankshaft)

  • P0016 Crankshaft Position – Camshaft Position Correlation (Bank 1 Sensor A)
  • P0017 Crankshaft Position – Camshaft Position Correlation (Bank 1 Sensor B)
  • P0018 Crankshaft Position – Camshaft Position Correlation (Bank 2 Sensor A)
  • P0019 Crankshaft Position – Camshaft Position Correlation (Bank 2 Sensor B)

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