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:mad: recently my check engine light came on, hooked up a scan tool and it told me that i have p1259 vtec malfunction pressure switch circuit or vtec solenoid valve ciruit.
can any please help me on how to diagnosis this problem. i also still drive it and when i hit WOT, the car pulls hard and still vtec is engaged, like it still runs fine. i already checked the oil level and its fine. anybody thanks
 

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does it always come on now? or it just that one time? did u clear the code? pull the ECU fuse
 

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check oil level and wiring at VTEC solenoid, if every thing ok then reset ECU and take car for road test. VTEC solenoid located right above oil filter.
during road test; drive car in 1st gear with engine speed at 4000 RPM for few seconds, repeat it three times.
if code P1259 isn't present then you have no problem, if code comes back then you would need to do a troubleshooting.
 
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