The code B1233 is an engine code and it appears for the error of the engine. If it is necessary to fix the problem of the engine, the technician need to use manual of the engine along with it is important to know the model number and manufacturer of the car. The code B1233 means different like B for Body Problem. 1 for MFG – Manufacturer Specific. 2 for Fuel and Air Metering (Injector Circuit Malfunctions Only) and 33 for Engine Fault Code. You get the code B1233 for your tires rotated. If tires rotated at every oil modification is a good regulation of thumb.