The general or automobile meaning of the C1455 Code is found online and it is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 4 for Transmission. 5 for TP Sensor Learn Not Complete and 5 for Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. The C1455 engine code seems a kind of chassis problem and it is easy to fix. In the distorted state, the lifters are unable to lift their companion pushrods under the controller rocker arms, ensuing in valves that cannot be activated and continue closed.