This paper presents an error-correction scheme to enhance the performance of typical CAN bus. The proposed scheme uses Reed-Solomon (R-S) codec to calculate the parity for the transmission of typical CAN bus. Compared with prior work in terms of Hybrid Automatic Repeat Request (HARQ) scheme for CAN bus transmission, the proposed scheme does not modify the standard CAN protocol but insert an R-S codec unit as an error-correction between Electronic Control Unit (ECU) and CAN bus. In other words, the focus of our proposed scheme is not on modifying the fixed CRC codec of the standard structure, but on increasing the performance based on an additional enhancement module. Experimental results show that the execution time of standard CAN bus can be reduced by the proposed scheme for almost half of transmission time on typical design, while accompanying very minor cost when errors are not correctable or without errors.