The Engine Diagnostic B1255 Code is important to understand. The code generally appears for the error in tiers. It is necessary to collect the engine manual and car manual to understand the code. With the manual, the technician needs to know the manufacturer and model of the car. As manufacturer and model of the car, the meaning of the car may be changed. The meaning of the car is B for Body Problem 1 for MFG – Manufacturer Specific, 2 for Fuel and Air Metering (Injector Circuit Malfunctions Only) and 55 for 55 Engine Fault Code. The code B shows for electronic suspension, steering systems and antilock brake system.