OBD Guide
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B1A82

External Trip Switch

B1A82 is an OBD-II diagnostic trouble code meaning: External Trip Switch. Common causes: switch circuit open, short circuit in the circuit. Estimated repair cost: $56–167.

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

Symptoms

  • The security system malfunction indicator is on
  • Airbags or seat belt pretensioners do not work
  • Error persists after scanning

Causes

  • Switch circuit open
  • Short circuit in the circuit
  • Mechanical damage to the switch
  • Wiring Harness Problems
  • Contact corrosion

How to Fix

  1. Check the continuity of the switch circuit
  2. Inspect the wiring harness for damage
  3. Check contacts for corrosion
  4. Replace switch if necessary
  5. Reset the error and check the system

Related codes

B1A81B1A83B1000

FAQ

What does the B1A82 code mean?

B1A82 is an OBD-II diagnostic trouble code that indicates: External Trip Switch

What causes a B1A82 error code?

The most common causes of B1A82 include: Switch circuit open; Short circuit in the circuit; Mechanical damage to the switch; Wiring Harness Problems.

How do I fix a B1A82 diagnostic trouble code?

To fix B1A82: Check the continuity of the switch circuit. Inspect the wiring harness for damage. Check contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A82?

Do not drive — repair immediately

How much does it cost to fix B1A82?

The estimated repair cost for B1A82 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat