Which cars report code B0021?

Code B0021 is named in 8 US owner complaints. Models: 6, model years 2008–2021. Buick Enclave, Chevrolet Impala, Chevrolet Malibu, Chevrolet Traverse, Jaguar F-Pace.

B0021 code: Left Curtain Deployment Control 1

Q: What does code B0021 mean?

Left Curtain Deployment Control 1. How to read B0021: the letter B means body (including airbags and belts); the second digit 0 marks a generic SAE code shared by all makes; the last three characters 021 identify the specific fault.

Code B0021 is named in 8 US owner complaints. Models: 6, model years 2008–2021.

What the code means

Left Curtain Deployment Control 1. Generic meaning per SAE J2012 (the same for all makes).

How to read B0021: the letter B means body (including airbags and belts); the second digit 0 marks a generic SAE code shared by all makes; the last three characters 021 identify the specific fault.

Restraint system codes: airbag squibs, belt pretensioners, crash sensors and occupant classification. After a crash with airbag deployment, many makers require the restraint module to be replaced or reset by procedure because it stores crash data. An airbag light on an auction car is not cosmetic: airbags, the module and sensors can cost more than the body repair.

Key figures

Complaints with this code: 8
Models: 6
Model years: 2008–2021

Which models and years

Models whose owners name this code (6). Years link to the model year problems page.

Model	Years	Complaints
Buick Enclave	2014, 2015	2
Chevrolet Impala	2009	2
Chevrolet Malibu	2010	1
Chevrolet Traverse	2014	1
Jaguar F-Pace	2021	1
Saturn Outlook	2008	1

Components named together with the code

Component as the owner filed it (one complaint can list several).

Air bags 8
Electrical system 2
Other 1

Complaints by model year

2008 1
2009 2
2010 1
2014 2
2015 1
2021 1

What to do if an auction car has this code

Ask for a dash photo at start-up: the airbag light must go off after the self-test.
Check the interior photos for deployed airbags and fired belt pretensioners: replacing the restraint module, airbags and sensors is a large separate part of the estimate.
Budget a scan with a restraint module read-out: the code alone does not say which part failed.

What owners report

Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.

Was claim the guarantee and the dealer is unable to repair the component. As the diagnostic report as follow: Historic DTC B0021-13 LEFT CURTAIN DEPLOYMENT CONTROL 1- CIRCUIT OPEN, at the moment of inspection vehicle did not have airbag MIL on.
Jaguar F-Pace 2021 · 2023-04
4 codes were pulled inlcuding: 1. B0021 passenger seat side air bag deployment loop open. 2. B001B passenger pretensioner deployment loop 2 open. 3. B001B passenger pretensioner deployment loop 2 high resistance 4.
Chevrolet Impala 2009 · 2020-11
Warning light: passenger seatside airbag deployment loop code: B0021 car dealership said they contanced manufactuare and said they would not fix that or where I suspect the car is having transmission problems since it takes longer than it should when I accelerate from where I start driving after a redlight, once I hit…
Chevrolet Traverse 2014 · 2019-08

Related codes

Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.