MechanicDB
Fault Family System: Network (U-Codes) 80 SAE Codes

Software Incompatibility Module

Diagnostic & Technical Explanation
U0301 sets when a control module detects that another module on the network is running a software or calibration version it does not recognize as compatible -- commonly after a module is replaced with the wrong part number, flashed with the wrong calibration file, or left with no calibration installed at all. The physical wiring and bus hardware are typically fine; the fix is verifying the correct part number for the vehicle's build and reprogramming the mismatched module with a compatible calibration file.

These 80 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 80 times.

Codes in this family (80)

CodeDefinitionRepair coverage
U0301Software Incompatibility With ECM/PCM4 ranked fixes
U0302Software Incompatibility With Transmission Control Module4 ranked fixes
U0303Software Incompatibility With Transfer Case Control Module4 ranked fixes
U0304Software Incompatibility With Gear Shift Control Module A4 ranked fixes
U0305Software Incompatibility With Cruise Control Module4 ranked fixes
U0306Software Incompatibility With Fuel Injector Control Module4 ranked fixes
U0307Software Incompatibility With Glow Plug Control Module 14 ranked fixes
U0308Software Incompatibility With Throttle Actuator Control Module4 ranked fixes
U0309Software Incompatibility With Alternative Fuel Control Module4 ranked fixes
U030ASoftware Incompatibility With Evaporative Emission System Leak Detection Control Module4 ranked fixes
U030BSoftware Incompatibility With Glow Plug Control Module 24 ranked fixes
U030CSoftware Incompatibility With Reductant Quality Module4 ranked fixes
U030DSoftware Incompatibility With NOx Sensor A4 ranked fixes
U030ESoftware Incompatibility With NOx Sensor B4 ranked fixes
U030FSoftware Incompatibility With Reductant Control Module4 ranked fixes
U0310Software Incompatibility With Fuel Pump Control Module4 ranked fixes
U0311Software Incompatibility With Drive Motor Control Module4 ranked fixes
U0312Software Incompatibility With Battery Energy Control Module A4 ranked fixes
U0313Software Incompatibility With Battery Energy Control Module B4 ranked fixes
U0314Software Incompatibility With Four-Wheel Drive Clutch Control Module4 ranked fixes
U0315Software Incompatibility With Anti-Lock Brake System (ABS) Control Module4 ranked fixes
U0316Software Incompatibility With Vehicle Dynamics Control Module4 ranked fixes
U0317Software Incompatibility With Park Brake Control Module4 ranked fixes
U0318Software Incompatibility With Brake System Control Module A4 ranked fixes
U0319Software Incompatibility With Steering Effort Control Module4 ranked fixes
U031ASoftware Incompatibility With Transmission Range Control Module4 ranked fixes
U031BSoftware Incompatibility With DC/DC Converter Control Module A4 ranked fixes
U031CSoftware Incompatibility With Brake System Control Module B4 ranked fixes
U031DSoftware Incompatibility With Parking Assist Control Module A4 ranked fixes
U031ESoftware Incompatibility With Parking Assist Control Module B4 ranked fixes
U031FSoftware Incompatibility With Accessory Protocol Interface Module4 ranked fixes
U0320Software Incompatibility With Power Steering Control Module4 ranked fixes
U0321Software Incompatibility With Suspension Control Module A4 ranked fixes
U0322Software Incompatibility With Body Control Module4 ranked fixes
U0323Software Incompatibility With Instrument Panel Control Module4 ranked fixes
U0324Software Incompatibility With HVAC Control Module4 ranked fixes
U0325Software Incompatibility With Auxiliary Heater Control Module4 ranked fixes
U0326Software Incompatibility With Vehicle Immobilizer Control Module4 ranked fixes
U0327Software Incompatibility With Vehicle Security Control Module4 ranked fixes
U0328Software Incompatibility With Steering Angle Sensor Module4 ranked fixes
U0329Software Incompatibility With Steering Column Control Module4 ranked fixes
U032ASoftware Incompatibility With A/C Compressor Control Module4 ranked fixes
U0330Software Incompatibility With Tire Pressure Monitor Module4 ranked fixes
U0331Software Incompatibility With Body Control Module A4 ranked fixes
U0332Software Incompatibility With Multi-axis Acceleration Sensor Module A4 ranked fixes
U0333Software Incompatibility With Gear Shift Control Module B4 ranked fixes
U0334Software Incompatibility With Radio4 ranked fixes
U0335Software Incompatibility With Hybrid/EV Battery Pack Sensor Module4 ranked fixes
U0336Software Incompatibility With Restraints Control Module4 ranked fixes
U0337Software Incompatibility With Battery Charger Control Module A4 ranked fixes
U0338Software Incompatibility With Remote Function Actuation Module4 ranked fixes
U0339Software Incompatibility With Body Control Module B4 ranked fixes
U033ASoftware Incompatibility With Hybrid/EV Battery Interface Control Module A4 ranked fixes
U033BSoftware Incompatibility With Hybrid/EV Battery Interface Control Module B4 ranked fixes
U033CSoftware Incompatibility With Hybrid/EV Battery Interface Control Module C4 ranked fixes
U033DSoftware Incompatibility With Hybrid/EV Battery Interface Control Module D4 ranked fixes
U033ESoftware Incompatibility With Hybrid/EV Battery Interface Control Module E4 ranked fixes
U033FSoftware Incompatibility With Hybrid/EV Battery Interface Control Module F4 ranked fixes
U0340Software Incompatibility With Hybrid/EV Battery Interface Control Module G4 ranked fixes
U0341Software Incompatibility With Hybrid/EV Battery Interface Control Module H4 ranked fixes
U0342Software Incompatibility With Hybrid/EV Battery Interface Control Module I4 ranked fixes
U0343Software Incompatibility With Hybrid/EV Battery Interface Control Module J4 ranked fixes
U0344Software Incompatibility With Hybrid/EV Battery Interface Control Module K4 ranked fixes
U0345Software Incompatibility With Hybrid/EV Battery Interface Control Module L4 ranked fixes
U0346Software Incompatibility With Hybrid/EV Battery Interface Control Module M4 ranked fixes
U0347Software Incompatibility With Hybrid/EV Battery Interface Control Module N4 ranked fixes
U0348Software Incompatibility With Hybrid/EV Battery Interface Control Module O4 ranked fixes
U0349Software Incompatibility With Hybrid/EV Battery Interface Control Module P4 ranked fixes
U034ASoftware Incompatibility With Engine Disconnect Clutch4 ranked fixes
U034BSoftware Incompatibility With Brake Booster Control4 ranked fixes
U034CSoftware Incompatibility With Battery Energy Control Module C4 ranked fixes
U034DSoftware Incompatibility With Vehicle Thermal Management Control Module4 ranked fixes
U034ESoftware Incompatibility With Active Grille Air Shutter Module A4 ranked fixes
U034FSoftware Incompatibility With Active Grille Air Shutter Module B4 ranked fixes
U0350Software Incompatibility With Active Grille Air Shutter Module C4 ranked fixes
U0351Software Incompatibility With Active Grille Air Shutter Module D4 ranked fixes
U0352Software Incompatibility With NOx Sensor C4 ranked fixes
U0353Software Incompatibility With Ion Sense Module4 ranked fixes
U0354Software Incompatibility With Hybrid/EV Battery Inductive Charger Control Module4 ranked fixes
U3510Control Module Missing Calibration4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here: