At its core, B1352 means your vehicle's computer can't tell if the key is actually in the ignition. This circuit is primarily responsible for the "key-in-ignition" reminder chime that sounds when your door is open. Why Does It Happen?
: The internal tab or plunger that grounds the circuit when a key is inserted can wear down or break. b1352.mp4
If you are dealing with this code, most mechanics on forums like JustAnswer or the Ford F150 Forum suggest: At its core, B1352 means your vehicle's computer