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P0021 2006 Nissan Altima Sedan Code - Intake Valve Timing Control Performance Bank 2

- Code Popularity: 6,085 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0021 2006 Nissan Altima Sedan?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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)
⚠ Does your Nissan have Safety Recalls? → Check here

How to Fix the DTC P0021 2006 Nissan Altima Sedan?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0021 2006 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

When there is a gap between angle of target and phase-control angle degree, the valve will stop working and the ECM will trigger the P0021 code.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/Loss of power
  • Engine rough idle

Code P0021 2006 Nissan Altima Sedan Description

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 2006 Nissan Altima Sedan - Intake Valve Timing Control Performance Bank 2 - AutoCodes.com
P0021 2006 Nissan Altima Sedan Code - Intake Valve Timing Control Performance Bank 2

Need More Information on the Code?

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