21 VTEC Solenoid Valve

DTC 21 - Variable Valve Timing (VTEC) Solenoid Valve

DTC 21 - VTEC Solenoid Valve Page 1:

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The Check Engine warning light may come on, indicating a system problem, when, in fact, there is a poor or intermittent electrical connection. First, check the electrical connections, clean or repair connections if necessary.