P1260

P1260 in the Ford definition is a PATS (Passive Anti-Theft System) lockout code meaning the PCM was told by the PATS module / instrument cluster that the key transponder did not authenticate — the vehicle will crank but not start (or start and immediately die after 2 seconds), and the security indicator will flash a roughly 10-minute lockout countdown on the cluster before allowing another start attempt. Cheapest-first ladder: (1) Read PATS-specific data on a capable scan tool (Forscan is gold-standard for Ford PATS work) — it'll show whether the transceiver coil around the ignition lock cylinder is seeing the key, whether the key ID matches programmed keys, and the lockout-timer state. (2) Try the spare key — if the spare starts and the primary key won't, the primary transponder is dead and needs reprogramming (most 1996-2014 Fords require two working keys to self-program a third, otherwise dealer/locksmith with PATS-capable tool). (3) Inspect the transceiver coil — the ring antenna around the ignition lock cylinder is fragile and breaks internally; symptom is intermittent no-start that gets worse in cold. (4) On modern Focus / Fusion / Escape with key-fob start, check the fob battery — a dying CR2032 doesn't trigger a low-battery warning but does cause PATS lockout. Don't reflash the PCM or attempt to clear the code by power-cycling the battery — Ford PATS will set permanent inhibit flags on multiple failed authentication attempts that require dealer-level re-flash with a security access token, not a generic OBD clear; reading KAM for prior unauthorized-tune flags is also worth doing because some chip-tuner devices disable the PATS handshake and leave the module permanently misaligned.

Vehicle-specific patterns: 1996-2014 Ford Mustang is the canonical P1260 — the ignition lock cylinder and the transceiver coil around it both wear out (the lock cylinder physically, the coil wire breaks internally from steering-column vibration), and Mustangs in track / autocross service see this fail by 80k miles; the fix is a lock cylinder + coil ring + sometimes both keys reprogrammed. 2000-2011 Ford Focus throws P1260 most commonly from a dying key-fob battery on the integrated-fob models — replace the CR2032 and the lockout clears after the 10-minute timer. 2003-2011 Crown Vic / Grand Marquis / Town Car (Panther) sees P1260 in police-fleet use from transceiver coils that wear from key-on-a-chain weight. 2008-2014 Ford F-150 with the integrated key-head transponder throws P1260 when the key body cracks and the transponder chip shifts out of antenna range. Estimated repair: $120 (replace CR2032 + key reprogram) to $750 (ignition cylinder + transceiver coil + two-key reprogram at dealer).