OBD Guide
ENFRDEESPT

B2172

Inertia Switch Input Circuit Open

B2172 is an OBD-II diagnostic trouble code meaning: Inertia Switch Input Circuit Open. Common causes: broken wiring in the inertia switch circuit, inertia switch malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • The passive safety system fault indicator is on
  • The passive safety system may not work in an accident.

Causes

  • Broken wiring in the inertia switch circuit
  • Inertia switch malfunction
  • Poor contact in connectors
  • Wiring harness damage

How to Fix

  1. Check the integrity of the wiring in the inertia switch circuit
  2. Check contacts in connectors
  3. Check the functionality of the inertial switch
  4. Replace damaged components

Related codes

B2171B2173B0100

FAQ

What does the B2172 code mean?

B2172 is an OBD-II diagnostic trouble code that indicates: Inertia Switch Input Circuit Open

What causes a B2172 error code?

The most common causes of B2172 include: Broken wiring in the inertia switch circuit; Inertia switch malfunction; Poor contact in connectors; Wiring harness damage.

How do I fix a B2172 diagnostic trouble code?

To fix B2172: Check the integrity of the wiring in the inertia switch circuit. Check contacts in connectors. Check the functionality of the inertial switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2172?

Do not drive — repair immediately

How much does it cost to fix B2172?

The estimated repair cost for B2172 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat