My engine light comes on and off. hasn't come on in a while. want to do a trip?

Here is what the diagnostic found: Definition: aaVTEC oil pressure switch circuit low voltage Probable Cause: aa1: Check engine oil level and pressure aa2: Open or short circuit condition aa3: Failed VTEC pressure switch OEM Number to Cross: P2646

IF the oil was not low , or extremely degraded, replace the switch. REF. Honda TSB 13-021