The engine C1156 Code helps to solve the car engine problem quick. The engine C1156 OBD2 may also be generated by faults previous down the line. So, a dirty MAF sensor might be causing the car to overreact in its fuel-trim adjustments. As a result, the oxygen sensors are probable to account fuel combination problems. The car C1156 engine code appears a type of chassis problem. While the company proposed to use a hydraulically controlled method that could be transferred from within the car, the type they executed had to be manually altered in the engine section using hand tools.