Airbags

B0093 — Left Side Restraints Sensor 3 Circuit Fault

Severity: medium Safe to drive

What B0093 means

The SRS control module constantly monitors restraint system sensors and their circuits. B0093 means it detected an open, short or implausible signal in the left restraints sensor 3 circuit. Depending on the vehicle, this may be a side impact or other restraint sensor. The module stores the code and turns on the SRS warning light.

Symptoms

  • Airbag / SRS warning light on or flashing
  • Restraint system warning message in the cluster
  • Some passive safety functions may be disabled
  • Fault may come and go, for example over bumps

Possible causes

  1. Failed left side restraints sensor
  2. Open circuit or short to ground or power in the sensor wiring
  3. Corroded or loose connector
  4. Wiring damage after body repair, seat removal or trim work
  5. Rarely, a faulty SRS module

How to diagnose

  1. Scan for codes with a tool that reads SRS and note any other faults
  2. Review freeze frame data and see whether the fault is current or intermittent
  3. Inspect the left sensor connector and wiring for damage, moisture or past repairs
  4. Check connector fit and terminal condition
  5. Test circuit resistance and shorts following the manufacturer wiring diagram
  6. Check the sensor with scan tool data or swap in a known good unit
  7. Clear the code and confirm it does not return

Common fixes

  • Repair wiring or replace a damaged connector
  • Clean and re-tension connector terminals
  • Replace the left restraints sensor
  • Replace or reprogram the SRS module if it is confirmed faulty

Questions and answers

What does B0093 mean?

It is a circuit fault in the left side restraints sensor 3. The SRS module sees a problem in the wiring, connector or sensor itself.

Can I drive with B0093?

Yes, the car will drive normally. But the left airbags or pretensioners may not work in a crash, so get it diagnosed soon.

Can I just clear B0093?

Clearing only turns the light off for a while. If the cause remains, the code returns and the system stays compromised.

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.