Code Definition

B1142 (08) — Ignition Status 1 Circuit Low

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

About B1142

B1142 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 B1142 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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.

B1142 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 Body Control Module (BCM) monitors the Ignition Status 1 input circuit to determine ignition switch position (OFF, ACC, RUN). The Ignition Status 1 signal is one of several discrete inputs the BCM uses to distribute power state information across the vehicle network, waking other modules and enabling accessory and ignition controlled loads. DTC B1142:08 is logged when the BCM detects a persistently low voltage (typically below approximately 1.0 volts) on the Ignition Status 1 circuit for longer than the defined threshold (approximately 0.5 seconds) while the ignition is commanded to ACC or...

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