Symptom Related Diagnostic Procedures
VTEC Solenoid Valve Troubleshooting Flowchart (part 1 of 2):
Troubleshooting Flowchart VTEC Solenoid Valve (part 2 of 2):
Malfunction Indicator Lamp (MIL) indicates Diagnostic Trouble Code (DTC) 21: A problem in the VTEC Solenoid Valve Circuit.