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1999 to 2003 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped Super Duty and Excursion. |
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From time to time, a programmer will trigger the Passive Anti-Theft System (PATS) on an Excursion, Lightning, Mustang, or other PATS equipped vehicles. This is caused by a loss of communication between the PCM and the PATS module which triggers the PATS module to go into "THEFT" mode and disable the PCM for a period of time. Some vehicles are more sensitive than others in regards to what triggers the PATS system with some vehicles triggering it during some sessions and not in others.
In the event that this does occur and the "THEFT" light is flashing, use the following procedure to restore vehicle functionality.
If the PCM is not disabled, it should respond with a P1260 DTC (Theft Detected / Vehicle Immobilized) along with any other possible DTCs that may be stored. If this is the case, turn the key to the "OFF" position and remove the ground (-) battery cable (from both batteries if your vehicle is equipped with two) for a period of ONE HOUR to allow the theft codes to clear. Re-attach the cables and attempt to start the vehicle. If the PCM is disabled and the programmer is not able to ready any DTCs or other data from the PCM, you may try restoring the vehicle back to the original stock calibration. If this still doesn't work, you'll need to contact your programmer vendor for further assistance in troubleshooting the reason for the no-start. I hope this is helpful. ![]()
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