U0300 to U0331: software incompatibility between modules
A module found that its own software (U0300), or the software of another module such as the engine, gearbox, ABS, steering, body or immobilizer module, is not a version it can work with.
SeverityHighCarrying on can cause expensive damage, so deal with it now.
Can you keep driving?Only as far as the workshopWhat does U0300 mean?
Each module checks that the modules it talks to run software versions and configurations it was designed to work with. A mismatch usually appears after a module has been replaced with a used or wrong part, after an update was installed on one module but not on another, or after programming was interrupted. Until the software matches, the module that raised the code may refuse to use the other one's data, switching features off or running in a protective mode.
What causes U0300?
- A replacement module, new or used, that was not programmed or coded for this car
- A software update applied to one module but not to the others that depend on it
- Programming interrupted by a weak battery or a lost connection
- A module taken from a different version of the same model
What to check first for U0300
- Ask whether a module was replaced or updated recently, and which one
- Have the module part numbers and software versions read and compared with the maker's information
- Have the module programmed or coded for this car with the maker's tool, with a battery support unit connected
- Clear the code only after programming, and check that it does not return
Can you drive with U0300?
Drive only to a workshop. Depending on which module is affected, the engine, the gearbox, the ABS or the steering assistance may work in a reduced mode; have the car towed if the engine will not start or several warning lights are on.
Clear a code only after the fault is fixed. A code that comes back means the cause is still there, and a warning light left on can hide a second fault behind the first.
Codes on this page
32
- U0300Internal Control Module Software Incompatibility
- U0301Software Incompatibility with ECM/PCM
- U0302Software Incompatibility with Transmission Control Module
- U0303Software Incompatibility with Transfer Case Control Module
- U0304Software Incompatibility with Gear Shift Control Module
- U0305Software Incompatibility with Cruise Control Module
- U0306Software Incompatibility with Fuel Injector Control Module
- U0307Software Incompatibility with Glow Plug Control Module
- U0308Software Incompatibility with Throttle Actuator Control Module
- U0309Software Incompatibility with Alternative Fuel Control Module
- U0310Software Incompatibility with Fuel Pump Control Module
- U0311Software Incompatibility with Drive Motor Control Module
- U0312Software Incompatibility with Battery Energy Control Module "A"
- U0313Software Incompatibility with Battery Energy Control Module "B"
- U0314Software Incompatibility with Four-Wheel Drive Clutch Control Module
- U0315Software Incompatibility with Anti-Lock Brake System Control Module
- U0316Software Incompatibility with Vehicle Dynamics Control Module
- U0317Software Incompatibility with Park Brake Control Module
- U0318Software Incompatibility with Brake System Control Module
- U0319Software Incompatibility with Steering Effort Control Module
- U0320Software Incompatibility with Power Steering Control Module
- U0321Software Incompatibility with Ride Level Control Module
- U0322Software Incompatibility with Body Control Module
- U0323Software Incompatibility with Instrument Panel Control Module
- U0324Software Incompatibility with HVAC Control Module
- U0325Software Incompatibility with Auxiliary Heater Control Module
- U0326Software Incompatibility with Vehicle Immobilizer Control Module
- U0327Software Incompatibility with Vehicle Security Control Module
- U0328Software Incompatibility with Steering Angle Sensor Module
- U0329Software Incompatibility with Steering Column Control Module
- U0330Software Incompatibility with Tire Pressure Monitor Module
- U0331Software Incompatibility with Body Control Module "A"
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
