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

[WalterMarie]

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.

[LunaAnn]

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.

[DelLawson]

When encountering a VTEC oil pressure switch circuit high voltage warning, my first reaction is not to panic. There are various reasons: sensor aging failure, poor line contact, short circuit, or oil issues. For a simple solution, first unplug and replug the sensor connector to check for oxidation or corrosion; clean it with a cleaning agent. Oil inspection is essential: Is the oil level normal? Is the oil quality clear? If it's dirty, change it immediately to avoid clogging the oil passages. Also, check the fuse—find and replace the corresponding one in the fuse box. Those with hands-on skills can use a multimeter to measure the voltage; if it's above 5V, it indicates a short circuit. Although this issue seems minor, ignoring it can cause the VTEC system to malfunction, increasing engine load and leading to higher costs over time. If you can't handle it yourself, find a trusted mechanic—spending a bit on repairs is better than facing major issues later.

[LeJulian]

My Honda car reported a VTEC oil pressure circuit high error, which is quite annoying. It means the switch signal voltage is too high, possibly due to a faulty sensor, short circuit, or insufficient oil. The solution is simple: first, stop the car and check the oil level; if it's low, add new oil. If the oil is too dirty, replace the filter. For circuit issues, check the fuse box; replace any blown fuses and try again. If that doesn't work, don't force it to avoid accidents. Safety is the top priority, so contact a repair shop for diagnosis as soon as possible.