Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Ford Expedition RWDFACTORY OEM SERVICE PROCEDURE
Disabling Unlimited Key Mode
- Using a diagnostic tool, select PCM from the menu. Follow SECURITY ACCESS to obtain security access. For additional information, refer to ANTI-THEFT SECURITY ACCESS .
- Select: DISABLE UNLIMITED KEY MODE.
- Select: IGNITION KEY CODE ERASE.
- Disconnect the diagnostic tool and turn the ignition key to OFF.
- Program in 2 keys to enable the vehicle by inserting the first encoded key into the ignition lock cylinder and turning the switch to the RUN position for 3 seconds, then back to OFF.
- Insert the second encoded key into the ignition lock cylinder and turn the switch to the RUN position, after 3 seconds the THEFT INDICATOR should extinguish.
- Program any additional keys using either Key Programming Using Two Programmed Keys or Key Programming Using Diagnostic Equipment.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.