P0263 P0263 code definition Cylinder Number 1 Contribution/Balance Fault What the P0263 code means P0263 is an [OBD-II diagnostic trouble code] which indicates that the engine control module (ECM) (https://www.yourmechanic.com/article/what-is-a-vehicle-s-electrical-control-unit) detected the cylinder number 1 having low contribution to the...
