OBD Guide
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B1877

Short to Ground in Passenger Side Front Seat Cushion Squib Circuit

B1877 is an OBD-II diagnostic trouble code meaning: Short to Ground in Passenger Side Front Seat Cushion Squib Circuit. Common causes: damage to the wiring harness near the front passenger seat, short circuit in the squib circuit. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • SRS malfunction lamp is on
  • The front passenger airbag may not deploy in an accident.

Causes

  • Damage to the wiring harness near the front passenger seat
  • Short circuit in the squib circuit
  • Faulty front passenger seat airbag squib
  • Damaged SRS connector
  • SRS control unit malfunction

How to Fix

  1. Check the wiring harness for damage
  2. Check connectors and contacts for corrosion or oxidation
  3. Check the squib resistance
  4. Check the serviceability of the SRS control unit
  5. Replace damaged components if necessary

Related codes

B1878B1879B1880

FAQ

What does the B1877 code mean?

B1877 is an OBD-II diagnostic trouble code that indicates: Short to Ground in Passenger Side Front Seat Cushion Squib Circuit

What causes a B1877 error code?

The most common causes of B1877 include: Damage to the wiring harness near the front passenger seat; Short circuit in the squib circuit; Faulty front passenger seat airbag squib; Damaged SRS connector.

How do I fix a B1877 diagnostic trouble code?

To fix B1877: Check the wiring harness for damage. Check connectors and contacts for corrosion or oxidation. Check the squib resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1877?

Do not drive — repair immediately

How much does it cost to fix B1877?

The estimated repair cost for B1877 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat