The engine B2239 Code has multiple meanings what depend on the manuafcturer and it is necessary to get the correct meaning of the code for your code if you want to resolve the problem from the car. The common meaning of the code is not everything for resolving the car engine but you can follow the general meaning of the code to comprehend the problem well. The dictionary or general menaing of the code is b for Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor one Performance. 3 for Cruise Control Servo Indicates Low and 9 for Kick-Down Switch Failed Short.