OBD Guide
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B1287

Amplifier Control Signal Circuit

B1287 is an OBD-II diagnostic trouble code meaning: Amplifier Control Signal Circuit. Common causes: open or short circuit in wiring harness, poor contact in amplifier connectors. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • The SRS light on the dashboard is on
  • The passive restraint system is not activated during the test
  • The error persists after being reset by the scanner

Causes

  • Open or short circuit in wiring harness
  • Poor contact in amplifier connectors
  • Malfunction of the amplifier itself
  • Problems with the SRS control unit

How to Fix

  1. Check the wiring harness for damage
  2. Inspect the amplifier connectors for oxidation or damage.
  3. Check the resistance of the scanner control circuit
  4. If necessary, replace the amplifier or SRS control unit

Related codes

B1286B1288B1289

FAQ

What does the B1287 code mean?

B1287 is an OBD-II diagnostic trouble code that indicates: Amplifier Control Signal Circuit

What causes a B1287 error code?

The most common causes of B1287 include: Open or short circuit in wiring harness; Poor contact in amplifier connectors; Malfunction of the amplifier itself; Problems with the SRS control unit.

How do I fix a B1287 diagnostic trouble code?

To fix B1287: Check the wiring harness for damage. Inspect the amplifier connectors for oxidation or damage.. Check the resistance of the scanner control circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1287?

Limited driving only, diagnose soon

How much does it cost to fix B1287?

The estimated repair cost for B1287 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat