P0021 Hyundai Code - 'A' Camshaft Position Timing Over-Advanced Or System Performance Bank 2
Quick Answer
The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the exhaust camshaft. Common causes include Dirty Oil, Low engine oil level, Faulty Valve Timing Control (VTC). 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 Hyundai indicates 'A' Camshaft Position Timing Over-Advanced Or System Performance Bank 2.
- Common causes
- Common causes include Dirty Oil, Low engine oil level, Faulty Valve Timing Control (VTC).
- 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 Hyundai Description
The deviation of the camshaft position from the target point is evaluated during stable driving condition. The Engine Control Module (ECM) accumulates this deviation for a certain period and sets DTC P0011 when the accumulated deviation is too high. The target camshaft position is predetermined value depending on engine speed and throttle angle in the ECM.
What are the Possible Causes of the DTC P0021 Hyundai?
- Dirty Oil
- Low engine oil level
- Faulty Valve Timing Control (VTC)
- Valve Timing Control (VTC) harness is open or shorted circuit.
- Valve Timing Control (VTC) circuit poor electrical connector
- Incorrect timing
- Engine mechanical problems
- Damaged Engine Control Module (ECM)
How to Fix the DTC P0021 Hyundai?
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
Hyundai Accent (MC)
Hyundai 2003-2006 SULEV Elantra (XD)
Hyundai 2004-2008 Tiburon 2.0L (GK)
Hyundai Tucson 2.0L (JM)
Hyundai Elantra (HD)
Hyundai Elantra Touring (FD)
Hyundai Genesis Coupe (BK)
Hyundai Sonata (NF)
Hyundai Santa Fe
Hyundai Sonata (NF)
Hyundai Santa Fe (CM)
Hyundai Azera (TG)
Hyundai Veracruz (EN)
Hyundai Entourage (EP),
Hyundai Genesis Coupe (BK)
Hyundai Genesis Sedan (BH)Genesis Sedan (BH)
The bulletin provides information on how to inspect and diagnose problems related to the Oil Control Valve (OCV) used in Constant Variable Valve Timing (CVVT), if at any time the OCV is suspected as the caused of rough idling, poor acceleration, camshaft timing misalignment-related trouble codes, misfire-related trouble codes.
Factory Service Bulletin: Hyundai Constant Variable Valve Timing Oil Control Valve Inspection OBDII Code P0021
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0021 Hyundai 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 Hyundai Code
1. What are the common symptoms of OBDII code P0021 on a Hyundai?
- Common symptoms include rough idling, loss of power, poor acceleration, engine knocking, and possible stalling.
2. What does the OBDII code P0021 'A' Camshaft Position Timing Over-Advanced Or System Performance Bank 2 mean for a Hyundai?
- This code indicates that the camshaft position on bank 2 is over-advanced or performing poorly, affecting the engine's timing.
3. What are the potential causes of OBDII code P0021 on a Hyundai?
- Possible causes include a faulty camshaft position sensor, issues with the camshaft phaser, timing chain problems, oil flow issues, or engine control module malfunctions.
4. How can I diagnose the OBDII code P0021 on my Hyundai?
- Diagnosis may involve checking the camshaft position sensor, inspecting the timing chain, testing the oil pressure, and scanning the engine control module for any related fault codes.
5. Can I drive my Hyundai with OBDII code P0021?
- It is not recommended to drive your Hyundai with this code as it can lead to further engine damage and potential safety risks due to poor performance.
6. How can I repair OBDII code P0021 on my Hyundai?
- Repair options may include replacing the camshaft position sensor, fixing timing chain issues, ensuring proper oil flow, and resetting the engine control module.
7. What are the long-term effects of ignoring OBDII code P0021 on a Hyundai?
- Ignoring this code can lead to severe engine damage, reduced fuel efficiency, increased emissions, and potential engine failure if left unresolved.
8. Are there any preventive maintenance tips to avoid OBDII code P0021 on my Hyundai?
- Regularly scheduled maintenance, including timely oil changes, checking for engine leaks, and following the manufacturer's recommended service intervals, can help prevent issues that trigger this code.
9. Can a DIY enthusiast fix OBDII code P0021 on a Hyundai?
- Depending on the level of expertise, some DIY enthusiasts may be able to address simpler causes of this code, such as replacing the camshaft position sensor. However, more complex issues may require professional assistance.
10. How much does it typically cost to repair OBDII code P0021 on a Hyundai?
- Repair costs for this code can vary depending on the exact cause of the issue, but expenses may range from $200 to $800 or more, including parts and labor.
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