Diagnostic Aids

If DTC P0010 is displayed, check right bank VVT system circuit. If DTC P0020 is displayed, check left bank VVT system circuit. Read freeze frame data using hand-held tester or OBD-II scan tool, as freeze frame data records engine conditions when a malfunction is detected. When troubleshooting, it is useful to determine whether vehicle was running or stopped, engine was warmed up or not, air-fuel ratio was lean or rich, etc. at time of malfunction.