My prelude loss pwer and i have code p1259 what is the solution?

have the OBD codes read as this will pinpoint the faulty sensor/switch , this will save you time and money searching for the fault blind , keep me posted if you wish

Check if there is spark, eventually replace spark plugs.

Check air intake and air filter.

Check fuel filter and check that the fuel pump is fine, that there is pressure and pump is not noisy.

p1259 (you scan that or autozoned?)
the honda FSM covers this best but in brief
Vtec mess up... varible valve timing magic.

http://engine-codes.com/p1259_honda.html

P1259 VTEC system malfunction

P1259 HONDA - VTEC System Malfunction
Possible causes- Low engine oil pressure or level
- Open or short circuit condition
- Faulty VTEC oil pressure switch
- Faulty VTEC solenoid
When is the code detected?The P1259 is set when there is a problem in the VTEC Oil Pressure Switch circuit or VTEC Solenoid Valve circuit

P1259 is the code for the VTEC pressure switch.

1. Check your oil level first, if oil level is low the code will come on. Add oil and reset the light.
2.you might have a bad Vtec oil pressure switch, try replacing it.

Code P1259 is a VTEC System Malfunction. I don't think there's a code for a bad oil pressure switch, just an oil dash light.

do you mean dtc code p1259 which is (P1259 Immobilizer to PCM Signal Error)

p1259 is a problem with the VTEC system. this system is for improved performance at higher rpm's. oil can get sludged up and clog the system, or the VTEC solenoid can just go bad. you can always have someone with a scan tool clear the codes to turn off the light, but until the problem is fixed, it will just keep coming back on

P1259 is a code for vtec malfunction usually cause by a bad vtec solenoid, vtec pressure sensor, low oil level, bad connection. Was oil change done? May want to check the oil level. P1166 is a code for a primary o2 sensor 1.