Can a code reader run without the engine running?
Can a code reader run without the engine running? One of the things most code readers do today is check live data. You cannot check live data without the engine running (well, you can, but it won't be "live data"). There are a lot of reasons why you might want to keep checking the vehicle, leaving the scanner plugged into the OBDII port and scanning for DTCs. Why is DTC should not be checked when the engine is running? Why it is said that DTC (Diagnostic Trouble Code) should not be checked when the engine is running? In the two...