B0028Airbag/SRS

Right Side Deployment Loop (Curtain/Side)

B0028 indicates a deployment-loop fault on the right-side airbag circuit, often a side curtain or roof-rail airbag. The loop is open, shorted, or out of range.

🚗 Yes, but a right-side airbag may not deploy, so treat it as urgent.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty side curtain inflator$300-$900

40%

The roof-rail curtain inflator squib fails open or shorted.

#2Corroded pillar or roof connector$0-$200

30%

Connectors at the A or C pillar corrode and open the loop.

#3Damaged roof-rail wiring$150-$500

20%

Headliner work or water intrusion damages the harness.

🩺 Common Symptoms

Airbag/SRS warning light on
Right curtain airbag may not deploy
Fault after headliner or trim work
Stored side loop fault

💰 Repair Cost: DIY vs Shop

DIY Cost

$0-$250

Shop Cost

$200-$900

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose B0028

1Disarm the SRS system per the service manual

2Inspect pillar and roof-rail connectors for corrosion

3Check for water intrusion near the harness

4Replace the curtain inflator only after confirming the loop fault

❓ Frequently Asked Questions

Can I drive with B0028?

Yes, but the right curtain airbag may not deploy, so get it fixed promptly.

Why did B0028 appear after trim work?

Removing the headliner or pillar trim can disturb the curtain airbag connectors.

What causes B0028?

A failed curtain inflator or a corroded pillar connector are the usual causes.

🔗 Related Codes

B0020B0022B0053U0151