The easiest fix is to let the editor overwrite the bad data. the NFS Carbon Save Editor. Load your corrupted save file. Navigate to the "Garage" or "Cars" section. Select the car causing the error. Locate the "Heat" field. Change the value to 1.0 or 0.0 . Save the changes and launch the game. Method 2: Manual Hex Editing
The most frequent cause. In Carbon , your Career garage and your Challenge Series garage are separate, but save editors sometimes blend them. If you copy a car from Challenge Series (where heat values are relaxed) directly into your Career save without recalculating the heat flag, the editor sees a mismatch. Nfs Carbon Save Editor Invalid Car Heat Value