P0021 - Camshaft Position 'A' Timing Over-Advanced or System Performance Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

P0021 Possible Causes

  • Faulty Intake Valve Timing Control Solenoid Valve
  • Intake Valve Timing Control Solenoid Valve harness is open or shorted
  • Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
  • Faulty Camshaft Position Sensor
  • Camshaft Position Sensor harness is open or shorted
  • Camshaft Position Sensor circuit poor electrical connection
  • Faulty Crankshaft Position Sensor (POS)

P0021 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0021 Meaning

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.

The intake valve timing control solenoid valve changes the oil amount and direction of flow through intake valve timing control unit or stops oil flow. The longer pulse width advances valve angle. The shorter pulse width retards valve angle. When ON and OFF pulse widths become equal, the solenoid valve stops oil pressure flow to fix the intake valve angle at the control position.

OBDII Code P0021 - Camshaft Position 'A' Timing Over-Advanced or System Performance Bank 2 - Engine-Codes.com

P0021 Information for specific makes

  • P0021 AUDI 'A' Camshaft Position Timing Over-Advanced Or System Performance Bank 2
  • P0021 BMW 'A' Camshaft Position Timing Over-Advanced or System Performance Bank 2
  • P0021 FORD Intake Camshaft Position Timing Over Advance Bank 2
  • P0021 HYUNDAI 'A' Camshaft Position Timing Over-Advanced Or System Performance Bank 2
  • P0021 INFINITI Intake Valve Timing Control Performance Bank 2
  • P0021 KIA 'A' Camshaft Position Timing Over-Advanced Or System Performance Bank 2
  • P0021 LEXUS Camshaft Position 'A' Timing Over-Advanced or System Performance Bank 2
  • P0021 MAZDA CMP Timing Over Advanced Left side
  • P0021 MINI 'A' Camshaft Position Timing Over-Advanced or System Performance Bank 2
  • P0021 NISSAN Intake Valve Timing Control Performance Bank 2
  • P0021 SCION Camshaft Position 'A' Timing Over-Advanced or System Performance Bank 2
  • P0021 SUBARU Camshaft Position 'A' Timing Over Advance or Performance Bank 2
  • P0021 SUZUKI Intake Valve Timing Control Performance Bank 2
  • P0021 TOYOTA Camshaft Position 'A' Timing Over-Advanced or System Performance Bank 2
  • P0021 VOLKSWAGEN 'A' Camshaft Position Timing Over-Advanced Or System Performance Bank 2

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