What to Do When the VTEC Oil Pressure Switch Circuit is Too High?
2 Answers
It may be caused by the need to replace the engine oil, or issues with the VTEC solenoid valve, pressure switch, or VTEC system failure. To determine the cause of the high VTEC oil pressure switch circuit, the following aspects should be checked: 1. Solenoid Valve: Check if the solenoid valve is damaged, or if the grounding and power supply lines of the solenoid valve are short-circuited to the positive terminal. 2. Pressure Switch: Check if the pressure switch is damaged, or if the pressure signal feedback from the pressure switch is normal. 3. VTEC System: Check if the oil pressure in the VTEC system oil passage is abnormal, or if there is any mechanical malfunction in the VTEC system.
My car also had the VTEC oil pressure switch circuit voltage too high warning before, which is quite a common issue. Excessive voltage indicates abnormal circuit signals, possibly due to a faulty sensor itself or a short circuit causing false alarms. The first step is to quickly check the engine oil dipstick in the engine bay to see if the oil level is within the normal range; if it's low, top it up with good quality oil. If the oil is too dirty, replace it along with the filter, as poor-quality oil can affect pressure readings. Next, inspect the relevant fuses in the fuse box; replace any that are blown. If the problem persists, there might be damaged wiring or loose connections—use a multimeter to check the voltage. Don’t ignore this fault; VTEC relies on oil pressure to function, and excessive voltage can mislead the system, leading to engine valve issues, increased fuel consumption, or component damage. For safety, I recommend taking it to a professional shop to scan the fault codes with a diagnostic tool—better to get it fixed properly in one go than to tinker around yourself.
