Disabling Unlimited Key Mode

2010 Ford Mustang Base, 2D Coupe, AutomaticSECTION Disabling Unlimited Key Mode
NOTE: By disabling the unlimited key mode, the previous access code no longer operates the vehicle.
  1. From the scan tool, enter TOOLBOX. Select BODY-SECURITY-PATS Functions and follow the IDS on-screen instructions to ENTER SECURITY ACCESS. For additional information, refer to ANTI-THEFT SECURITY ACCESS .
  2. Select: "unlimited key mode OFF" and follow the IDS on-screen instructions.
  3. Select: "Ignition Key Code Erase" and follow the IDS on-screen instructions.
  4. Disconnect the scan tool and turn the ignition switch to OFF (the key does not need to be removed at this time).
  5. Turn the first PATS  key to the ON position for 3 seconds (6 seconds if it is an IKT  key).
  6. Turn the first PATS  key to the OFF position and remove the key from the ignition lock cylinder.
  7. Insert the second PATS  key into the ignition lock cylinder and turn the key to the ON position for 3 seconds (6 seconds if it is an IKT  key).
  8. Start the vehicle with both PATS  keys. The vehicle now starts with both PATS  keys.
  9. NOTE: With the unlimited key mode turned off, a maximum of 8 keys can be programmed into the IPC  using the KEY PROGRAMMING USING TWO PROGRAMMED KEYS  procedure. The IPC  PID SPAREKEY must be enabled.
  10. If it is desired to program additional key(s), refer to KEY PROGRAMMING USING TWO PROGRAMMED KEYS  for each additional key that needs to be programmed. The PID SPAREKEY must be enabled.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.