B0088 DTC – Right Rear Side Impact Sensor Circuit Malfunction

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B0088 DTC – Right Rear Side Impact Sensor Circuit Malfunction

The Diagnostic Trouble Code (DTC) B0088 indicates that the Supplemental Restraint System (SRS) has detected a malfunction in the right rear side impact sensor circuit. The sensor monitors side collisions and transmits impact information to the SRS control module, allowing it to determine whether side airbags should deploy. Sensor location and wiring configuration vary by manufacturer.

Symptoms

  • Airbag warning light illuminated.
  • Service Airbag message displayed.
  • Side airbag system disabled.
  • B0088 stored in the SRS control module.

Possible Causes

  • Faulty right rear side impact sensor.
  • Open circuit in the sensor wiring.
  • Short circuit to ground or battery voltage.
  • Loose, damaged, or corroded connector.
  • Damaged wiring harness.
  • Faulty SRS (SDM) control module.

How to Diagnose B0088

  1. Read all SRS Diagnostic Trouble Codes using a professional scan tool.
  2. Inspect the right rear side impact sensor connector.
  3. Check the wiring harness for cuts, corrosion, or pin damage.
  4. Measure circuit continuity and verify power and ground if applicable.
  5. Replace the impact sensor if wiring tests are normal.
  6. Clear the DTC and verify that the fault does not return.

Typical Circuit Diagram

        SRS Control Module
               │
               │
               ▼
Right Rear Side Impact Sensor
               │
               │
               ▼
      Impact Signal to SDM
               │
               ▼
      Airbag Deployment Logic

Repair Cost

  • Wiring repair: $30–120
  • Side impact sensor replacement: $80–250
  • SRS control module replacement: $300–900

Related DTCs

  • B0087
  • B0088
  • B0089
  • B0090

FAQ

Is it safe to drive with DTC B0088?

The vehicle may still be drivable, but the side airbag system may not function correctly in a collision. Repair is recommended as soon as possible.

Can damaged wiring cause B0088?

Yes. Broken wires, poor connections, or corrosion are common causes of this code.

Will replacing the sensor always fix B0088?

No. The wiring, connectors, and SRS control module should be inspected before replacing the sensor.

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