AutoCodes - Nissan - P0021 2004 NISSAN MAXIMA

P0021 2004 NISSAN MAXIMA Code - Intake Valve Timing Control Performance Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0021 2004 NISSAN MAXIMA code 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 do I fix the P0021 2004 NISSAN MAXIMA code?

Check 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.

|P0021 2004 NISSAN MAXIMA 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 the engine oil and filter and reset the engine code. If the code comes back you can remove the Intake valve timing control solenoid and clean it with brake cleaner.









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|Cost of diagnosing the P0021 2004 NISSAN MAXIMA code

Labor: 1.0

The cost of diagnosing the P0021 2004 NISSAN MAXIMA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0021 2004 NISSAN MAXIMA 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 P0021 2004 NISSAN MAXIMA code possible symptoms?

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

|P0021 2004 NISSAN MAXIMA code description

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve. The Engine Control Module (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 the high-speed range.
The intake valve timing control solenoid valve changes the oil amount and direction of flow through the intake valve timing control unit or stops oil flow. The longer pulse width advances the valve angle. The shorter pulse width retards the 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 2004 Nissan Maxima - Intake Valve Timing Control Performance Bank 2 - AutoCodes.com

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|P0021 2004 NISSAN MAXIMA code comments

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Repair Importance Level: 3
 
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