You need fix the problem of the engine and the B1761 Code comes for the problem of the engine. For the B, it means the problem has started with the body of the engine. The dictionary meaning of the code is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 7 for Auxiliary Emission Controls. 6 for Control Module Throttle Actuator Position Performance and 1 for TFP Valve Position Switch-Drive Without Drive Ratio. You should not trust this meaning until you know the exact meaning according to the manufacturer name and model number of the car.