DTC Troubleshooting: P0021, P25E2 (3.0L Engine): Notes

DTC P0021  : Variable Valve Timing Control (VTC) A (Intake, Bank 2) System Timing Over-Advanced DTC P25E2  : Variable Valve Timing Control (VTC) A (Intake, Bank 2) System Timing Over-Retarded

How to use this service information .

NOTICE: 

Before you troubleshoot, review the How to Troubleshoot - Refer to: How to Troubleshoot the Fuel and Emissions Systems (3.5L Engine) or How to Troubleshoot the Fuel and Emissions Systems (3.0L Engine) .