The engine C1870 Code lets you know the problem of the engine and for the car engine solution, getting the correct meaning is necessary to know. You can know the general meaning of the code but do not use that until you get the accurate meaning of the engine code. The automobile/general meaning of the engine is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 8 for Ignition System Or Misfire. 7 for Vehicle Speed Output Circuit and 0 for Transmission Engaged At High Throttle Angle. Do not drive the car till the car engine is fixed.