Definition: The theft deterrent fuel enable circuit is an anti-theft system that prevents the engine from starting if the key is not recognized by the vehicle. If the theft deterrent fuel enable circuit is not functioning properly, the engine may not start, or may stall after starting.
Symptoms:
* Engine may not start
* Engine may stall after starting
* Security light may be illuminated
Causes:
* Faulty ignition switch
* Faulty fuel pump relay
* Faulty wiring
* Faulty PCM
How to Fix:
1. Check the ignition switch for damage or wear. If the ignition switch is damaged or worn, it will need to be replaced.
2. Check the fuel pump relay for damage or wear. If the fuel pump relay is damaged or worn, it will need to be replaced.
3. Check the wiring for damage or corrosion. If the wiring is damaged or corroded, it will need to be repaired.
4. If the ignition switch, fuel pump relay, and wiring are all in good condition, the PCM may need to be reprogrammed or replaced.
Note: The theft deterrent fuel enable circuit is a complex system that can be difficult to diagnose. If you are not comfortable diagnosing and repairing electrical problems, you should take your vehicle to a qualified mechanic.
