The general meaning or the automobile meaning of the U1151 Code does not let you solve the car engine problem. The problem of the car engine cam be fixed with proper meaning. If the general meaning of the code is followed, then many problems may found in the car engine. The automobile dictionary meaning of the code is U for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 1 for Transmission. 5 for TP Sensor Learn Not Complete and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. You should be careful when you drive the car if the car engine is not fixed.