B0066

Left Front/Driver Pretensioner Deployment Loop Voltage Out of Range

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

SRS (airbag) light is on
The pretensioner may not work in an accident.
Error B0066 in the diagnostic scanner memory

Causes

Open or short circuit in pretensioner wiring harness
Pretensioner squib malfunction
Corrosion or poor contact in connectors
Problems with the SRS control unit
Previous activation of the pretensioner (after an accident)

How to Fix

Diagnose the SRS system using a scanner
Check the integrity of the wiring harness to the pretensioner
Inspect connectors and contacts for corrosion
Check the resistance of the pretensioner squib
If necessary, replace the pretensioner or wiring harness.
Reset SRS errors after repair

Related codes

B0065 B0067 B0070