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P0018 - Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)

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DTC DESCRIPTION P0018 - CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 2 SENSOR A)

Description:  This DTC sets when a misalignment between the camshaft and crankshaft is detected. This DTC sets when the misalignment is 1 tooth or greater. This DTC can also set due to variable camshaft timing (VCT) system concerns (oil contamination or VCT solenoid stuck).
Possible Causes: 
  • VCT unit to camshaft alignment
  • Excessive camshaft timing chain wear
  • Camshaft timing incorrectly set
  • Continuous oil flow to the VCT piston chamber
  • Erratic camshaft position due to low oil pressure
  • Oil flow restriction in the oil passages or the VCT valve body
  • variable camshaft timing bank 2 solenoid 1 (VCT21) stuck in position
  • VCT21 circuit open
  • VCT21 circuit short to voltage
  • VCT21 circuit short to ground
  • VPWR circuit open
  • Camshaft advance mechanism binding (VCT unit)
  • Damaged VCT21 phaser
  • Damaged camshaft position bank 2 sensor 1 (CMP21)
  • CMP21 sensor circuits open
  • CMP21 sensor circuits short to voltage
  • CMP21 sensor circuits short to ground
  • Radio frequency interference
Diagnostic Aids:  This DTC may be accompanied by other DTCs. Diagnose all camshaft position (CMP) sensor DTCs first. If no CMP sensor related DTCs are present, continue to follow diagnosis for this DTC.
This DTC is a functional check of the VCT unit. Diagnose any base engine concerns related to the engine oil pressure or engine timing. Refer to the appropriate Engine System, Oil Pressure Test article, to check the engine oil pressure. Refer to the appropriate Engine article, to check the engine timing and VCT phasers.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test HK.
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