OBD Guide
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B1178

Right Front Seat Belt Buckle Pre-Tensioner Voltage Short

B1178 is an OBD-II diagnostic trouble code meaning: Right Front Seat Belt Buckle Pre-Tensioner Voltage Short. Common causes: wiring harness damage, short circuit in pretensioner circuit. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • Pretensioner does not react in an accident
  • SRS error message

Causes

  • Wiring harness damage
  • Short circuit in pretensioner circuit
  • Connection problems
  • Pretensioner malfunction

How to Fix

  1. Check the wiring harness for opens and shorts
  2. Check contacts and connections
  3. Test the performance of the pretensioner
  4. If necessary, replace faulty components

Related codes

B1177B1180B1179

FAQ

What does the B1178 code mean?

B1178 is an OBD-II diagnostic trouble code that indicates: Right Front Seat Belt Buckle Pre-Tensioner Voltage Short

What causes a B1178 error code?

The most common causes of B1178 include: Wiring harness damage; Short circuit in pretensioner circuit; Connection problems; Pretensioner malfunction.

How do I fix a B1178 diagnostic trouble code?

To fix B1178: Check the wiring harness for opens and shorts. Check contacts and connections. Test the performance of the pretensioner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1178?

Do not drive — repair immediately

How much does it cost to fix B1178?

The estimated repair cost for B1178 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat