OBD Guide
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B1206

Diagnosis Sensor Unit

B1206 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: wiring harness damage, contact corrosion. Estimated repair cost: $56–167.

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

Symptoms

  • The SRS indicator on the dashboard is on
  • The passive safety system does not activate in the event of an accident
  • The error persists after being reset by the scanner

Causes

  • Wiring harness damage
  • Contact corrosion
  • Internal diagnostic unit fault
  • SRS module software failure

How to Fix

  1. Check the integrity of the wiring harness and contacts
  2. Clean or replace damaged contacts
  3. Test the diagnostic unit with a scanner
  4. If necessary, replace the diagnostic unit or reflash the SRS module

Related codes

B1200B1201B1202

FAQ

What does the B1206 code mean?

B1206 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit

What causes a B1206 error code?

The most common causes of B1206 include: Wiring harness damage; Contact corrosion; Internal diagnostic unit fault; SRS module software failure.

How do I fix a B1206 diagnostic trouble code?

To fix B1206: Check the integrity of the wiring harness and contacts. Clean or replace damaged contacts. Test the diagnostic unit with a scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1206?

Do not drive — repair immediately

How much does it cost to fix B1206?

The estimated repair cost for B1206 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat