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.
2008 Ford Mustang V8-4.6LFACTORY OEM SERVICE PROCEDURE
Switch State Control
KEY PROGRAMMING SWITCH STATE CONTROL
Special Tool(s)
NOTE:
- The spare key programming switch is a programmable switch which provides the capability to enable/disable the normal customer spare key programming procedure detailed in the Owner's Literature. It must read ENABLED if more than 2 keys need to be programmed into the PCM, refer to Key Programming Using Two Programmed Keys. This programmable switch is provided as a convenience for rental company fleets or other fleet purchasers who may not want the Spare Key Programming procedure available to the vehicle driver. Using Two Programmed Keys
- The spare key programming switch state can be viewed with the PCM SPAREKEY PID.
- If the SPAREKEY PID reads ENABLED, up to 8 keys total can be programmed into the PCM, refer to Key Programming Using Two Programmed Keys. If the SPAREKEY PID reads DISABLED, the Key Programming Using Two Programmed Keys procedure will not function. This switch is set to ENABLED when the vehicle is built. This PID does not affect the Key Programming Using Diagnostic Equipment procedure or the Spare Key Programming - Unlimited Key Mode procedure or the Spare Key Programming - Using Diagnostic Equipment procedure. Using Two Programmed Keys
1. Insert a programmed passive anti-theft system (PATS) key into the ignition lock cylinder and turn the key from the OFF position to the ON position.
2. From the scan tool, enter TOOLBOX. Select BODY-SECURITY-PATS Functions and follow the on-screen instructions to ENTER SECURITY ACCESS.
3. NOTE: The default setting on delivery of all new vehicles is ENABLED.
From the scan tool menu select: "Customer Spare Key Programming Enable" (or "Customer Spare Key Programming Disable") and press the tick mark.
- "Customer Spare Key Programming Enable" - spare key programming procedure is accessible.
- "Customer Spare Key Programming Disable" - spare key programming procedure is not accessible.
Special Tool(s)
Special Tool(s):
NOTE:
- The spare key programming switch is a programmable switch which provides the capability to enable/disable the normal customer spare key programming procedure detailed in the Owner's Literature. It must read ENABLED if more than 2 keys need to be programmed into the PCM, refer to Key Programming Using Two Programmed Keys. This programmable switch is provided as a convenience for rental company fleets or other fleet purchasers who may not want the Spare Key Programming procedure available to the vehicle driver. Using Two Programmed Keys
- The spare key programming switch state can be viewed with the PCM SPAREKEY PID.
- If the SPAREKEY PID reads ENABLED, up to 8 keys total can be programmed into the PCM, refer to Key Programming Using Two Programmed Keys. If the SPAREKEY PID reads DISABLED, the Key Programming Using Two Programmed Keys procedure will not function. This switch is set to ENABLED when the vehicle is built. This PID does not affect the Key Programming Using Diagnostic Equipment procedure or the Spare Key Programming - Unlimited Key Mode procedure or the Spare Key Programming - Using Diagnostic Equipment procedure. Using Two Programmed Keys
1. Insert a programmed passive anti-theft system (PATS) key into the ignition lock cylinder and turn the key from the OFF position to the ON position.
2. From the scan tool, enter TOOLBOX. Select BODY-SECURITY-PATS Functions and follow the on-screen instructions to ENTER SECURITY ACCESS.
3. NOTE: The default setting on delivery of all new vehicles is ENABLED.
From the scan tool menu select: "Customer Spare Key Programming Enable" (or "Customer Spare Key Programming Disable") and press the tick mark.
- "Customer Spare Key Programming Enable" - spare key programming procedure is accessible.
- "Customer Spare Key Programming Disable" - spare key programming procedure is not accessible.
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.