B0033 critical

SRS Side Impact Sensor Circuit -- Right

The B0033 code means the vehicle's onboard diagnostic system has detected: SRS Side Impact Sensor Circuit -- Right. This is a critical severity code.

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Keep driving?
No -- stop driving
DIY difficulty
hard
Estimated cost
$150 - $600 (parts and labor)
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Common Symptoms

  • SRS warning light active
  • Right side impact sensor fault
  • Airbag system malfunction message
  • Audible warning chime
  • Safety inspection failure

Probable Causes (Ranked by Likelihood)

  • Failed right side impact sensor Very High
  • Damaged wiring in passenger door or B-pillar High
  • Corroded sensor connector Moderate
  • Previous side collision affecting sensor Moderate
  • Passenger door replacement with wiring mismatch Low

Step-by-Step Diagnostic Procedure

  1. Read SRS DTCs with compatible scanner

  2. Inspect right side impact sensor in door or B-pillar

  3. Check wiring harness from sensor through door jamb

  4. Measure sensor circuit resistance

  5. Verify sensor is properly mounted after any door work

Frequently Asked Questions

Can door hinge wear affect the sensor wiring?

Yes. As door hinges wear, the door alignment changes slightly, which can stress the wiring harness that passes through the door jamb and connects to the side impact sensor.

Is this a common issue after body work?

Yes. Side impact sensor codes frequently appear after body work on the affected side, especially if the door was replaced or the B-pillar area was repaired.

How is the sensor tested?

The sensor is tested by measuring its circuit resistance and comparing it to the manufacturer's specification, and by checking its signal output with a scan tool.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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