If the DTC is just deleted, the system may not reset the DTC until a certain distance is travelled. An example would be if a DTC says a calibration is needed. These are all actions that cannot be ignored. there was a loss of communication with a module. ![]() If the code was from a previous issue, it could hinder future diagnostics. Simply deleting these codes can leave the door open for problems further on. The DTC could be from the accident, from the repair process, or a previous issue altogether. When a DTC comes up on the scan, this means that there is an error or problem in the system. In order to properly repair the vehicle, the DTCs need to be recorded, investigated, and a decision made on how they should be handled. ![]() There is a misconception in the collision repair industry that when the physical repairs are completed, you hook up a scan tool, and clear all codes. Diagnostic trouble codes (DTCs) are normally the main goal of scanning, however, DTCs are often misunderstood.
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