B0018 GMC Possible Causes
- Faulty dashboard airbag
- Dashboard airbag restraint harness is open or short-circuited
- Poor electrical connection of the dashboard airbag restraint circuit
- Faulty Sensing and Diagnostic Module (SDM)
How to Fix B0018 GMC Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Airbag warning light on
B0018 GMC Meaning
The deployment loop of the Instrument Panel (I/P) airbag restraint module consists of a two-stage I/P module, an I/P module high control module, and I/P module low control circuits for both stages 1 and 2. There are 2 shorting bars used in the I/P module connector that will short together the I/P module high and I/P module low control circuits for both stages 1 and 2 when the connector is disconnected. This helps prevent unwanted deployment of the airbag module during maintenance. When the ignition is turned ON, the Sensing and Diagnostic Module (SDM) performs continuous diagnostic tests on the deployment loops to check circuit continuity and shorts to ground or voltage. If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in memory.