B1213 on 1997-2004 Ford F-150 (XL, XLT, Lariat, FX4, King Ranch) — Anti-Theft Number of Programmed Keys Is Below Minimum Value
1 vehicles · 1 makes · $100-$500 repair
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Ford F-150 · 1997–2004
The Passive Anti-Theft System (PATS) on these trucks disables fuel/injection when the PCM cannot verify the key transponder, leaving the truck cranking but not starting with the dash theft/security light flashing rapidly. Common triggers are a worn or dead key transponder, a loose or damaged transceiver antenna ring around the ignition cylinder, corroded PCM grounds (water intrusion at the passenger cowl/windshield), or intermittent PCM power. It often starts as an intermittent no-start that worsens.
Common Symptoms
- Engine cranks but will not start
- Theft/security light flashes rapidly or stays on
- Intermittent no-start that comes and goes
- Starts with one key but not another
- Dies immediately after starting
How to Fix
Read PATS/PCM DTCs. Try a known-good second key; re-seat/replace the ignition antenna ring; clean and tighten PCM/body grounds and check for windshield/cowl water leaks; verify PCM power and keep-alive. Re-program keys or replace the PATS/PCM as a last resort. Keeping two working programmed keys avoids most stranding.
Sources for this issue (1)
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B1213 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B1213 mean?
B1213 stands for "Anti-Theft Number of Programmed Keys Is Below Minimum Value." A Ford/Lincoln/Mercury code from the PATS (Passive Anti-Theft System, also marketed as SecuriLock) immobilizer, used on 1996-and-later Ford vehicles. It means fewer than the required minimum number of coded keys are programmed to the module — normally two. In most cases the vehicle still starts and drives normally on a programmed key; the code is the system reporting that it has no valid spare. Programming requires two working coded keys and, on many model years, a dealer-level scan tool.
What are the most common causes of B1213?
The most common causes of B1213 are: Only one key programmed after a key was lost, replaced, or added, PATS module, instrument cluster, or PCM replaced or reprogrammed without re-programming the full key set, Key programming session interrupted or a battery disconnect/dead battery during programming, Damaged or failed transponder chip in one of the keys, Faulty transceiver ring/antenna around the ignition lock cylinder, Wiring or connector fault between the transceiver and the PATS module. The specific cause varies by vehicle.
How much does it cost to fix B1213?
Repair costs for B1213 range from $100 to $500, depending on the vehicle and root cause.
Which vehicles are affected by B1213?
Au7o has documented B1213 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.