Credov

B0020 fault code: what it means

B0020: Left side airbag deployment circuit fault (often under the seat wiring).

Body · Safety risk

Usual causes, most likely first

  1. seat wiring plug
  2. side airbag
  3. wiring

B0020 by make

Ford

Left side airbag deployment circuit fault (often under the seat wiring).

Usual causes: seat wiring plug; side airbag; wiring

Haval

Haval: left side airbag deployment control fault.

Usual causes: seat airbag connector; wiring

Holden

Left side airbag deployment control fault.

Usual causes: seat airbag connector; wiring; airbag

Jeep

Left side seat airbag squib 1 circuit open (Cherokee KL). Airbag light on; FCA fits a jumper harness under the front seat.

Usual causes: seat airbag connector/harness under seat; seat airbag module

MG

MG: left side airbag deployment control fault.

Usual causes: seat airbag connector; wiring

Not sure what B0020 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.