What does the B0048 fault code mean?
The B0048 fault code, applicable to all car manufacturers, means “Third Row Right Side Airbag Deployment Control (Subfault)“.
Background Information: Side airbags are mainly divided into two categories: side torso airbags and side curtain airbags. Side torso airbags deploy from the seat or door panel to protect the occupant’s torso. Head protection is provided by an extension of the side torso airbag or by a head curtain airbag.
Symptoms of the B0048 fault code:
- The SRS/airbag indicator light on the dashboard illuminates.
- Error B0048 is stored in the control unit memory.
- The front passenger airbag may be disconnected.
- Sometimes the entire SRS system may malfunction.
Main causes of the B0048 fault code:
- Damage or oxidation of airbag connector contacts
- Wiring harness short circuit
- Faulty SRS module
- Incorrect connection after repair
- Airbag damage after an accident
B0048 fault code in different vehicles:
Chevrolet Cruze B0048: Usually occurs after improper installation following seat repair.
Opel Astra J B0048: Problem with the seat belt under the front passenger seat.
Buick Regal B0048: If the error repeats frequently, the SRS module needs to be replaced.
GMC Terrain B0048: Usually related to damage after an accident.
Cadillac CTS B0048: Calibration is required after module replacement.
How to diagnose the B0048 fault code?
- Connect an OBD2 scanner and read the fault code.
- Check the wiring harness and connectors under the passenger seat.
- Check circuit continuity and for short circuits.
- Reset the error code and check if it reappears.
- Test the SRS control module if necessary.
Possible Causes and Diagnostic Methods
| Possible Cause | How to check? |
|---|---|
| Damaged wiring or short circuit | Visual inspection, test continuity with a multimeter |
| Oxidation or breakage of buffer connectors | Check connectors, strip contacts |
| Faulty SRS control module | Scanner diagnosis, output check |
| Errors after seat repair or installation | Check correct connection and serviceability of the wiring harness |
Tools needed: OBD2 scanner, multimeter, technical vehicle manual, SRS diagnostic module (if equipped)
How to fix error code B0048? (Problem Solution)
Simple repair methods
- Reset the error code with a scanner
- Check and disconnect the airbag connector
- Check for breaks and restore wiring integrity
In-depth diagnostic and repair solutions
- SRS control module replacement
- Airbag replacement (if damaged)
- Control unit re-flashing if system failure occurs
Troubleshooting by Symptoms
| Symptom | Possible Solution |
|---|---|
| SRS indicator is stable | Check wiring and connections under the seat |
| Error code reappears immediately after reset | SRS module replacement or comprehensive diagnosis |
| Passenger airbag is not working | Check the circuit, replace damaged components |
B0048 Fault Code FAQ
Can you drive with a B0048 fault code?
No, because the error indicates a malfunction in the airbag system, directly affecting passenger safety.
What happens in an accident if error B0048 is active?
The passenger airbag may not deploy, significantly increasing the risk of injury.
Can I reset the B0048 fault code myself?
You can use an OBD2 scanner, but if the cause of the error is not eliminated, the fault code will reappear.
Is error B0048 related to seat replacement or removal?
Yes, incorrect connection of the airbag connector under the passenger seat often causes this error.
Do I need to replace the airbag to address error B0048?
Not necessarily. The cause is usually in the wiring or control module, but if the airbag is physically damaged, it must be replaced.
B0048 related OBD2 errors
B0012 – Passenger Frontal Stage 3 Deployment Control (Subfault)
B0020 – Left Side Airbag Deployment Control (Subfault)
B0051 – First Row Center Seatbelt Sensor (Subfault)
Important! If a B0048 error occurs, the airbag may not deploy. Never ignore errors in the SRS system. Even if the airbag “appears” to be functional, it may not work when needed if an error is present.