Code Definition

B1890 — PAD Warning Lamp Circuit Short to Battery

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

About B1890

B1890 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.

When B1890 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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.

B1890 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 Passenger Airbag Disable (PAD) Warning Lamp is a Ford SRS indicator that shows the vehicle occupants whether the passenger front airbag is currently enabled or disabled, often displayed as a PASS AIR BAG OFF message in the overhead console or upper centre dash. The Restraints Control Module (RCM) drives the indicator through a low side switched output and continuously monitors the circuit voltage for fault detection during key on operation. DTC B1890 sets when the RCM measures battery voltage on the lamp driver circuit while it is commanding the lamp off, which the module interprets as a s...

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