OBD Guide

B0065

Left Front/Driver Pretensioner Deployment Loop Open

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • The SRS/airbag light on the dashboard is on
  • No sound from the pretensioner when the ignition is turned on
  • Locking the rest of the SRS system in emergency mode

Causes

  • Broken wire in the SRS harness
  • Oxidation of contacts in the pretensioner connector
  • Pretensioner squib malfunction
  • Damage to the wiring harness after an accident
  • SRS control unit defective

How to Fix

  1. Carry out diagnostics using the SRS scanner
  2. Check pretensioner chain resistance
  3. Visually inspect the wiring harness and connectors
  4. If necessary, replace the harness or pretensioner
  5. Reset errors and check system operation

Related codes

Error B0065 by Vehicle Brand