The car engine C1729 Code is important thin and getting the real meaning of the code is necessary. Do not drive the car with any type of engine problem. The general meaning of the engine code is not important thing. Chassis problem is found in the car engine and the engine code C1729 is started with C and C means Chassis. The oxygen sensors on the car degree the oxygen in the finish to regulate how rich or thin the ratio of fuel and air are in the rolls. Some expensive machines are necessary for solving the car engine and you need to have proper experience.