
(VVT) Variable Valve Timing Issues – Dirty or Low Oil , and Over Advanced Timing
VVT, Variable Valve Timing Issues – Dirty or Low Oil , and Over Advanced Timing What Engine Codes P0011 and P0021 Mean for Your Car When your check engine light comes on, and you see P0011 or P0021, the problem usually involves the variable valve timing (VVT) system. These codes








