What to Do When the VTEC Oil Pressure Switch Circuit Voltage is Too High?

1 Answers
LaHadley
07/30/25 3:48am
It may require an oil change or could be caused by a faulty VTEC solenoid valve. If the solenoid valve fails to open, oil cannot enter the rocker arm chamber, keeping the rocker arm oil pressure switch in a closed state, which results in excessively high circuit voltage. To diagnose the root cause of excessive circuit voltage, inspect the following aspects: 1. Solenoid Valve: Check if the solenoid valve is damaged or if its grounding/power supply wires are shorted to the positive terminal. 2. Pressure Switch: Verify whether the pressure switch is faulty or if the pressure signal feedback from the switch is normal. 3. VTEC System: Inspect for abnormal oil pressure in the VTEC system oil passages or mechanical malfunctions within the VTEC system.
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