The B1965 Code is associated with the car engine and it is compulsory to understand it. Automobile engineer can easily identify the problem according the engine code. There is no reason left to run the faulty car. The code appears from the faulty engine of the car when the car is checked by the code reader of the engine. When the same code is found in multiple car engines, you need to know the specific meaning of the code for your car and you can know this from your car manual. By reading the manual of the car engine, it becomes easy to know the real mening of the code. You may use basic meaning of the code what is applicable for all car engine and that is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 9 for Fuel and Air Metering (Injector Circuit Malfunctions Only). 6 for Control Module Throttle Actuator Position Performance and 5 for Park or Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. From the dictionary meaning, you have understood that the body of the engine has the main problem what is easy to fix.