B0084Body / Restraints

Passenger Seat Position Sensor Circuit

B0084 indicates a circuit fault with the passenger seat position sensor. The airbag module detected an electrical problem in the sensor circuit used to judge seat position.

🚗 Use caution. Seat position affects airbag deployment, so have it inspected.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Wiring or connector fault to the sensor$50-$300

40%

Open, shorted, or corroded wiring under the seat sets this code.

#2Failed seat position sensor$100-$400

30%

A faulty sensor produces an out-of-range signal.

#3Damaged connector under the seat$50-$250

20%

Under-seat connectors are exposed to movement and debris.

#4Airbag control module fault$300-$900

10%

An internal module fault can misread the circuit.

🩺 Common Symptoms

Airbag warning light on
Restraint system fault message
Seat position sensing fault
Stored airbag codes

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$300

Shop Cost

$150-$500

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose B0084

1Scan the airbag module for the exact circuit fault

2Inspect the seat position sensor connector and wiring

3Check for damage from seat sliding

4Test the circuit values against service data

❓ Frequently Asked Questions

Can I drive with B0084?

Use caution. The airbag uses seat position to tailor deployment, so have it inspected promptly.

How is B0084 different from B0083?

They are closely related seat position sensor codes. B0084 specifically flags a circuit-level electrical fault.

What causes B0084?

Usually wiring or connector damage under the seat, or a failed seat position sensor.

🔗 Related Codes

B0083B0081B1000B1015