P0021 Intake Camshaft Position Timing Over Advanced Bank 2

Definition: The OBD-II code P0021 indicates that the Engine Control Module (ECM) has detected a problem with the variable valve timing system. Specifically, it means that the intake camshaft in bank 2 is more advanced than what the ECM has commanded.

P0021 – Intake Camshaft Position Timing Over Advanced Bank 2

Severity: Moderate

Common Causes

P0021 – Intake Camshaft Position Timing Over Advanced Bank 2

Common causes:

• Dirty or low engine oil
• Faulty camshaft position actuator solenoid
• Incorrect camshaft timing due to a jumped timing chain or belt
• Wiring issues in the camshaft position actuator circuit
• Faulty engine control module (ECM)

 

Common Misdiagnosis

OBD2 Code: P0021

Description: Intake Camshaft Position Timing Over Advanced Bank 2

Common Misdiagnosis: Replacing the camshaft position sensor without checking for issues with the variable valve timing (VVT) solenoid or oil control valve.

 

Common Diagnostic Steps

OBD2 Code: P0021

Description: Intake Camshaft Position Timing Over Advanced Bank 2

• Verify the code with an OBD-II scanner and clear it to see if it returns.
• Check the engine oil level and quality; replace if necessary.
• Inspect the camshaft position sensor for damage or wear.
• Examine the variable valve timing (VVT) solenoid for proper operation.
• Ensure that the VVT solenoid is receiving power and ground signals correctly.
• Inspect wiring and connectors related to the camshaft position sensor and VVT system for any signs of damage or corrosion.
• Check for any mechanical issues within the timing chain or belt, such as misalignment or wear.
• If applicable, verify that there are no obstructions in the oil passages leading to the VVT system.
• If all else fails, consider a professional diagnosis to check for more complex internal engine problems.