Code Definition

B1600 — PATS Ignition Key Transponder Signal Is Not Received

System: Body  |  Type: Manufacturer-Specific  |  Make: Ford

About B1600

B1600 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1600 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The PATS (Passive Anti Theft System) module is responsible for verifying the presence of a programmed transponder chip embedded in the ignition key before allowing the engine to start. DTC B1600 sets when the PATS transceiver, which is mounted around the ignition lock cylinder, fails to receive any radio frequency signal back from the key transponder during the start sequence. The transceiver energises the chip with a low power magnetic field and listens for a unique ID code, which the PATS or Instrument Cluster module then compares against its stored key list before enabling fuel and spark vi...

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