Question

1999 Acura CL 2.3L got the code p1259. What is the problem?

Answer 1

P1259 Acura - VTEC System Malfunction

Have you checked the oil level? either the oil is low or dirty. 

if its dirty (it can clog the vtec valve) you wont have oil pressure. 

replace the oil and filter and maybe remove the vtec valve and clean it.

Possible causes

- Low engine oil pressure or level

- Open or short circuit condition

- Faulty VTEC oil pressure switch

- Faulty VTEC solenoid