P0021 2002 Nissan Altima Sedan Code - Intake Valve Timing Control Performance Bank 2
Quick Answer
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0021 2002 Nissan Altima Sedan indicates Intake Valve Timing Control Performance Bank 2.
- Common causes
- Common causes include 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.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0021 2002 Nissan Altima Sedan Description
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.
What are the Possible Causes of the DTC P0021 2002 Nissan Altima Sedan?
- 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 to Fix the DTC P0021 2002 Nissan Altima Sedan?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0021 2002 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0021 2002 Nissan Altima Sedan Code
1. What are common symptoms of OBDII code P0021 on a 2002 Nissan Altima Sedan?
- Common symptoms include engine misfires, rough idling, reduced power and acceleration, and potentially stalling.
2. What does the OBDII code P0021 "Intake Valve Timing Control Performance Bank 2" mean for a 2002 Nissan Altima Sedan?
- This code indicates that there is a problem with the intake valve timing control system on bank 2 of the engine.
3. What are the possible causes of OBDII code P0021 on a 2002 Nissan Altima Sedan?
- Possible causes include a faulty intake valve timing control solenoid, clogged oil passages, low engine oil level, or issues with the engine's timing chain.
4. How can I diagnose the cause of OBDII code P0021 on my 2002 Nissan Altima Sedan?
- Diagnosing this code may involve checking the oil level and quality, inspecting the timing chain and related components, and testing the intake valve timing control solenoid.
5. Can I continue driving my 2002 Nissan Altima Sedan with OBDII code P0021?
- It is not recommended to continue driving with this code as it can lead to further engine damage and potentially more costly repairs.
6. How can I repair OBDII code P0021 on my 2002 Nissan Altima Sedan?
- Repairing this code may involve replacing the intake valve timing control solenoid, cleaning out any clogged oil passages, ensuring proper engine oil levels, or addressing issues with the timing chain.
7. Are there any maintenance tips to prevent OBDII code P0021 on a 2002 Nissan Altima Sedan?
- Regularly changing the engine oil and following the manufacturer's recommended maintenance schedule can help prevent issues that may trigger this code.
8. Can a DIY enthusiast fix OBDII code P0021 on a 2002 Nissan Altima Sedan?
- Depending on the skill level and experience of the individual, some DIY enthusiasts may be able to address this code themselves by following repair guides and using the necessary tools.
9. How much does it typically cost to repair OBDII code P0021 on a 2002 Nissan Altima Sedan?
- The cost of repair can vary depending on the specific cause of the code, but it may range from $200 to $600 or more, including parts and labor.
10. Will resetting the OBDII code P0021 on my 2002 Nissan Altima Sedan make it go away permanently?
- Resetting the code may temporarily clear the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.
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