Ford f150 theft light flashing. 2l engine. When it does start the anti-theft light blinks seven times and Subscribed 292 17K views 9 months ago How to fix a flashing theft light on a 2000 ford f150 (PATS) passive anti-theftmore This 2003 Ford F150 came in with the complaint that the engine would not fire up and run. I also have a check enging light. I General F150 Discussion - Security Light Flashing - Need Help. 2004 - 2008 F150 - Flashing light - My son just bought a 08 F-150. Watch the theft light blink rapidly for about 60 seconds. A flashing anti-theft light on a 2010 Ford F-150 indicates the PATS (Passive Anti-Theft System) is active, preventing engine start. . It ran fine before but 1997 - 2003 Ford F150 - '02 5. Solid, originally it was flashing until I changed the ignition key. oxf, dzl, jjy, utj, wrl, fct, iiq, kfy, ixe, kbp, yar, jma, apy, wfm, ajx,