The B1737 Code has a meaning and you will get the meaning from the automobile dictionary. The meaning of the code differs by the model number and manufacturer. The instruction of B1737 code when it derives to emissions linked car repair is that any alteration that changes the car from a certified shape to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal fault. Trading a catalyst with a conservative pipe is one traditional example. After fixing the problem of the car, take the car for a test drive and you can identify the problem.