Engine-Codes - Generic - P0021

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

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

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)

How is the P0021 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P0021 code

Labor: 1.0

The cost to diagnose the P0021 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

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.

More Information

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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 MERCEDES-BENZ 'A' Camshaft Position Timing Over Advanced or System Performance Bank 2
  • 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 Intake Camshaft Position Timing Over-Advanced Or System 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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