Due to the chassis problem of the car engine, the C1212 Code has come. Do not worry if you do not get the meaning of the code. If you search online for the meaning of the code, you will get the dictionary meaning but it is not important thing. The general meaning is simple meaning but it is not necessary thing. The engine C1212 OBD2 may also be caused by burdens earlier down the line. Such as, a dirty MAF sensor might be producing the car to overreact in its fuel-trim adjustments. So, the oxygen sensors are likely to report fuel mix problems.