Why do I have code P1259, and it says bank one. Just change pressure switch

Question

On my 1999 Honda Accord 3.0L, why do I have code P1259, and it says bank one. Just change the pressure switch

Answer 1

P1259 Problem in the VTEC oil pressure switch circuit or the solenoid VTEC valve circuit

The solenoid valve which is near the oil filter area.,there the VTEC pressure switch and there is the VTEC solenoid valve

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Answer 2

P1259 Honda Code - VTEC System Malfunction
Read more: https://www.autocodes.com/p1259_honda.html