The meaning of the engine C1181 Code is available as two different ways. One way is general/automobile dictionary meaning of the code and another is a real meaning/manufacturer meaning. 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. 1 for Transmission. 8 for Exhaust Gas Recirculation System Valve 1. 1 for TFP Valve Position Switch-Drive Without Drive Ratio. The car engine system employs specially developed hydraulic lifters for the C1181 code intake and exhaust valves. The lifters can be distorted by disengaging an inner locking pin. The fastening pin is disengaged using solenoids to alter oil compression fed into the lifter.