The B1871 Code is evolved for the engine problem and if the problem of the engine is not fixed, the car should not be driven. Getting the real meaning of code is important thing and you can know the real meaning if you know the manufacturer name and model number. If you read the manual of the car, you can solve the problem. However, expensive machines and tools are necessary to solve all problems from the car engine. If you have no experience and machines, you should not try to solve the problem. However, the problem is not so serious issue.