The diagnosis U1232 Code contains some information of the car engine problem and you can easily locate the engine problem from the car engine if you know the right meaning of the code. The automobile dictionary meaning of the engine code is U for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor 1 Performance. 3 for Cruise Control Servo Indicates Low and 2 for A/C System High Pressure High Temperature. This meaning of the code is not suitable always and you should be careful for solving the car engine.