The engine code C1259 is the main item to check is to prove the process of the VCT solenoid. You are looking for a piercing or stuck VCt solenoid valve triggered by corruption. Mention to car exact repair manual to achieve section tests for the VCT unit. The real meaning of the code is found manual of the car engine and the general meaning of the code is found as C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor 1 Performance. 5 for TP Sensor Learn Not Complete and 9 for Kick-Down Switch Failed Short.