OBD Guide
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B1878

Short to Positive in Passenger Side Front Seat Cushion Squib Circuit

B1878 is an OBD-II diagnostic trouble code meaning: Short to Positive in Passenger Side Front Seat Cushion Squib Circuit. Common causes: wiring harness damage, contact corrosion. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • The passive safety system may not work in the event of an accident.

Causes

  • Wiring harness damage
  • Contact corrosion
  • Squib malfunction
  • Airbag control module malfunction

How to Fix

  1. Check the integrity of the wiring harness
  2. Check squib resistance
  3. Replace damaged wires or squib
  4. Check the airbag control module

Related codes

B1877B1879B1880

FAQ

What does the B1878 code mean?

B1878 is an OBD-II diagnostic trouble code that indicates: Short to Positive in Passenger Side Front Seat Cushion Squib Circuit

What causes a B1878 error code?

The most common causes of B1878 include: Wiring harness damage; Contact corrosion; Squib malfunction; Airbag control module malfunction.

How do I fix a B1878 diagnostic trouble code?

To fix B1878: Check the integrity of the wiring harness. Check squib resistance. Replace damaged wires or squib. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1878?

Limited driving only, diagnose soon

How much does it cost to fix B1878?

The estimated repair cost for B1878 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat