The automobile meaning of the engine C1881 Code is not helpful but it can be read for gaining some information. Do not follow this meaning of the code what may lead to wrong direction. The automobile dictionary meaning of the code 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. 8 for Exhaust Gas Recirculation System Valve 1 and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. Concerning the C1881 engine code, it would maybe be worthwhile to sensibly inspect the cable harness near the intake manifold bracket.