Airbags

B0048 — Third Row Right Side Airbag Deployment Control Circuit Fault

Severity: high Drive with care, to a shop

What B0048 means

The SRS control module tests every airbag and pretensioner circuit each time the ignition is turned on. B0048 means it found a problem in the control circuit for the third row right side airbag, such as an open, a short, abnormal resistance or a module fault. The "Subfault" label points to a manufacturer-specific sub-type of the error.

Symptoms

  • SRS / airbag warning light on the dash
  • Warning light stays on or flashes after startup
  • Fault stored in the SRS module memory
  • System may treat the airbag as disabled
  • Other SRS circuit codes may appear alongside it

Possible causes

  1. Damaged wiring harness: open circuit or short to ground or power
  2. Corroded or loose connectors, including those under seats and behind trim
  3. Failed SRS control module
  4. Failed airbag or its inflator/squib
  5. Wiring damaged during seat or trim removal, or after a collision

How to diagnose

  1. Scan all modules with a tool that reads SRS data and note any related codes and whether the fault is current or stored.
  2. Ask about recent interior repairs, seat removal or body work.
  3. Inspect the SRS harness and connectors around the third row and right pillar for chafing, moisture and corrosion.
  4. Check that connectors are fully latched and that locks and shorting clips are intact.
  5. Disconnect the battery and wait the time specified by the manufacturer, then measure circuit resistance per service data. Never power or test an airbag squib with an ordinary meter.
  6. Rule out the SRS module by checking its power, ground and connector.
  7. Clear the code after repair and confirm it does not return.

Common fixes

  • Repair or replace damaged wiring and connectors
  • Clean contacts and fix the source of moisture
  • Replace the airbag or its deployment component
  • Replace or reprogram the SRS module if it is confirmed faulty

Questions and answers

What does B0048 mean?

The SRS module detected a fault in the control circuit of the third row right side airbag. The airbag may not deploy in a crash.

Can I just clear B0048?

A scan tool can erase it, but it will return if the fault remains. Airbag work is hazardous, so seek a shop if you lack experience.

Is it safe to drive with the SRS light on?

The car will run, but occupant protection is reduced. Have it diagnosed as soon as you can.

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.