B144B — Run/Crank Power Relay Circuit Short to Battery; Run/Crank Power Relay Circuit Short-Circuit to Earth; Run/Crank Power Relay Circuit Open

Manufacturer reference family

GM: B144B

Run/Crank Power Relay Circuit Short to Battery; Run/Crank Power Relay Circuit Short-Circuit to Earth; Run/Crank Power Relay Circuit Open

Reference namespace: gm
Source revision: legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

What should I check before using this definition?

Keep the full code, module, status and freeze-frame data. Confirm the vehicle’s make, model, year and current manufacturer service information before choosing a repair. This entry does not identify a failed part by itself.

Organize a scan report or recording

Source and applicability

OBD Lens production library legacy-owner-2026-10-09-v81. This is a scoped technical reference, not a scan of your car. A catalog relationship does not certify that every ECU, year or engine returns the same signal or code definition.

Read the reference method