If you want to study on car engine, then internet is the best place. You can learn many things about the car engine. The car engine code’s meanings are also available online and meaning of this car engine P2261 Code is also available there. You will get there general meaning and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor 1 Performance. 6 for Control Module Throttle Actuator Position Performance and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. Test the car engine as soon as possible.