Airbags

B0062 — Left Curtain Airbag Deployment Loop Open or High Resistance

Severity: medium Drive with care, to a shop

What B0062 means

The Supplemental Restraint System (SRS) control module continuously tests the deployment circuit of the left curtain airbag. B0062 is set when it sees an open circuit or resistance that is too high. The module then cannot be sure the airbag will fire in a crash, so it turns on the SRS warning light. Some references label this code as a passenger pretensioner fault, so confirm the exact circuit in the service information for your vehicle.

Symptoms

  • Airbag/SRS warning light on
  • "Service Airbag" message in the display
  • B0062 stored in the SRS module
  • Fault appears after seat, headliner or pillar trim work
  • Possible related codes for the passenger pretensioner or occupant sensing

Possible causes

  1. Open circuit or high resistance in the left curtain airbag wiring
  2. Corroded or loose SRS connectors
  3. Faulty left curtain airbag module or its initiator
  4. Damaged or unplugged passenger pretensioner connector
  5. Seat connector left unplugged or occupant sensing not transferred after a seat swap
  6. Failed SRS control module (rare)

How to diagnose

  1. Read all SRS codes with a scan tool that supports airbags and note freeze-frame data and whether the fault is current or history
  2. Inspect connectors under the left front seat, in the left pillar and under the headliner for damage, moisture and corrosion
  3. If seats, trim or body work were recently done, confirm every SRS connector is plugged in and locked
  4. After disconnecting the battery and waiting the time the manufacturer specifies, measure loop resistance per the wiring diagram. Never probe an airbag initiator directly with a multimeter
  5. Flex the harness at bends such as the door jamb and pillar to see if the fault changes
  6. Check the SRS module connector pins and ground connections
  7. If wiring is good, test with a known-good module or the manufacturer's approved simulator
  8. Clear codes after repair and confirm the SRS light stays off

Common fixes

  • Repair or replace the damaged wiring section or connector in the left curtain airbag loop
  • Clean or replace corroded terminals and secure the connectors
  • Replace the left curtain airbag module if the fault is confirmed
  • Replace or reprogram the SRS control module if all circuits test good and the fault persists

Questions and answers

Is it safe to drive with B0062 and the SRS light on?

The car will run, but the left curtain airbag may not deploy in a crash, and some SRS functions may be off. Have it diagnosed soon.

Can I fix B0062 myself?

Checking that connectors are seated and undamaged is reasonable for a DIYer. Work on airbag circuits is best left to a professional, since mistakes can cause accidental deployment.

Why did B0062 appear after a seat swap?

Removing a seat or trim makes it easy to leave an SRS connector unplugged or damage it. That is a common cause of an open circuit, so recheck every connector in the work area.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.