OBD Guide

B3855

Rollover Sensor Performance

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • The security system malfunction indicator is on
  • The passive restraint system may not engage in a rollover.
  • The error is stored in the memory of the on-board computer

Causes

  • Rollover sensor malfunction
  • Open or shorted wiring harness
  • Contact corrosion
  • Problems with the security control module

How to Fix

  1. Conduct diagnostics of the passive safety system
  2. Check the condition of the rollover sensor and its fastening
  3. Check the integrity of the wiring harness and contacts
  4. If necessary, replace the sensor or wiring harness
  5. Clear error memory and check system operation

Related codes

Error B3855 by Vehicle Brand