B0020: Left Side Airbag Deployment Control
What Does B0020 Mean?
B0020 is a diagnostic trouble code indicating: Left Side Airbag Deployment Control. This code relates to the body electrical system. It has been reported in NHTSA complaints across 13 different vehicle models.
Symptoms of B0020
- ⚠️ Airbag warning light on
Common Causes
- 🔍 Wiring or connector problem
- 🔍 Transmission component failure
- 🔍 Sensor or control module malfunction
B0020 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"About two months ago, SRS/Supplmental Restrain light came on. It has been coming on/off. Took to the dealership to check; however at that time the light was off-they did not find anything wrong. ON 9/5/24, the light came on again, took to the dealership same day. They diagnosed as code B0020-13. "
— Honda Accord owner, 07/02/2024
"On December 26, 2025, the supplemental restraint system problem appeared on the dashboard. On January 6, 2026, vehicle was taken to Stockton Honda service department to performed a diagnostic test and multi-point inspection was completed. During this time the diagnostic results showed a code B0020"
— Honda Accord owner, 12/26/2025
"The vehicle airbag warning light 'SRS' displays randomly. We paid almost $200 for a diagnosis and have been told the passenger airbag needs to be replaced at a cost of $800. The Diagnostic code is B0020-13 "open or increased resistance in the left side airbag inflator". I have contacted Honda an"
— Honda Cr-V owner, 11/01/2024
Source: NHTSA Complaints Database
Most Reported Vehicles for B0020
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | NISSAN ALTIMA | |
| 2 | CHRYSLER 200 | |
| 3 | HONDA ACCORD | |
| 4 | HONDA CR-V | |
| 5 | FORD FUSION | |
| 6 | NISSAN ROGUE | |
| 7 | JEEP CHEROKEE | |
| 8 | HONDA ODYSSEY | |
| 9 | CHEVROLET IMPALA | |
| 10 | NISSAN PATHFINDER | |
| 11 | DODGE CHARGER | |
| 12 | DODGE DURANGO | |
| 13 | JEEP COMPASS |
B0020 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Diagnostic Tips
- Scan all modules, save freeze-frame data, and clear unrelated history codes before focusing on B0020.
- Confirm whether companion codes are present first; they often identify the root cause sooner than the headline DTC.
- Prioritize inspection around air bags and the most common failure path for this code family.
- Perform a voltage-drop and continuity check on the affected circuit and verify 5V reference/ground stability under load.
- After each repair step, complete one drive cycle and verify readiness monitors instead of judging success after a quick idle test.
- If the code keeps returning on high-incidence platforms (for example NISSAN ALTIMA), check TSB patterns and wiring/connector fitment before major part replacement.
Common Mistakes to Avoid
- ❌ Skipping freeze-frame review and losing the exact RPM/load conditions when the fault set.
- ❌ Replacing modules before checking grounds, voltage drop, and harness rub-through near heat/vibration points.
- ❌ Clearing B0020 and returning the car before monitors complete — this often creates repeat visits.
- ❌ Treating intermittent wiring or connector faults as permanent component failure without wiggle testing.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
Reported Repair Costs for B0020
Based on 37 owner-reported repair costs from NHTSA complaints.
⚠️ These are owner-reported costs, not estimates. Actual costs vary by location, labor rates, and root cause. Source: NHTSA complaints database.
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Inspect wiring harness and connectors for damage, corrosion, or loose connections
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.