Code Definition

B1386 — Oil Level Lamp Circuit Short To Ground

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

About B1386

B1386 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1386 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.

B1386 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 instrument cluster or body control module monitors the oil level warning lamp drive circuit by checking the voltage at the lamp output terminal. DTC B1386 is set when the module detects a short to ground condition on this circuit, meaning the drive line reads near zero volts when the lamp is commanded off. The oil level warning lamp is illuminated by the cluster or BCM in response to a low oil level signal from the oil level sensor in the sump, alerting the driver to check oil before engine damage occurs. With this fault present, the lamp may stay on continuously regardless of actual oil l...

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